What is in This Article
- Can a Plasma Cutter Cut Titanium? What to Expect
- Which Gas Works for Plasma Cutting Titanium
- Plasma Gas Options Compared
- Heat-Affected Zone and Edge Condition
- Settings, Speed and Torch Setup
- Avoiding Oxidation and Contamination
- How to Plasma Cut Titanium Step by Step
- Safety Considerations for Cutting Titanium
- Finishing the Cut Edge
- Plasma vs Waterjet, Laser and Machining
- Frequently Asked Questions
- Conclusion
Can a plasma cutter cut titanium? Yes. Titanium conducts electricity, so plasma can cut it, but the edge will be oxidized and heat-affected. Use the machine cut chart, keep travel speed steady, expect to finish the edge on important parts, and treat titanium dust and fines as a fire hazard.
Quick Answer
Yes. Use clean, dry air or another gas your machine is approved for, set the amperage from the cut chart, move at a steady speed and test on scrap first. Plan to grind or machine the edge, and keep a metal-fire extinguisher nearby.
Key Takeaways
- Titanium is conductive and can be plasma cut, typically with clean, dry compressed air.
- Expect a blue or gold oxidized edge and a heat-affected zone.
- Critical parts need the edge machined back; use waterjet or machining when no heat damage is allowed.
- Titanium fines and dust can ignite, so control dust and keep metal-fire protection ready.
- Only use gases your plasma cutter manual lists.
Can a Plasma Cutter Cut Titanium? What to Expect
Titanium is electrically conductive, so a plasma cutter can cut it, and manufacturers such as Hypertherm and ESAB list it among the metals plasma handles. The catch is the edge. Titanium reacts with oxygen when hot, so expect a discolored, oxidized cut face, a heat-affected zone, and finishing work on any part that matters.
Start from the cut chart for your machine, make a test cut on scrap, and plan for fire safety around titanium fines and dust.
Which Gas Works for Plasma Cutting Titanium
A plasma torch melts a narrow path through the metal and blows the molten material out of the kerf, so the workpiece must complete the electrical circuit. Titanium does, and ESAB notes that it cuts reasonably well at settings similar to stainless steel of the same thickness.
What you should expect:
- A colored edge: ESAB describes blue or gold oxidation on air-plasma titanium cuts as normal and unavoidable.
- A rough, hardened edge: heat near the cut can change the surface, which matters for fatigue-critical parts.
- Limits set by the machine: maximum thickness and edge quality depend on the cutter, consumables and cut chart, not on the metal alone.
Plasma Gas Options Compared
Compressed air is the simplest and most common choice. ESAB lists clean, dry compressed air as the recommended gas for cutting titanium with a manual plasma cutter, and it is what most garage and handheld machines are built to use.
Some mechanized systems can use nitrogen or an argon-hydrogen mix instead. Hypertherm describes argon-hydrogen (typically 35% hydrogen and 65% argon) as the hottest-burning option and warns that the system must be designed for it. Never connect a hydrogen-bearing gas to a cutter that is not approved for it.
Heat-Affected Zone and Edge Condition
| Gas | Where it fits | Main caution |
|---|---|---|
| Clean, dry compressed air | Handheld and garage cutters; the usual starting point | Oxidized blue or gold edge; moisture or oil in the air hurts the arc |
| Nitrogen | Systems whose manual lists nitrogen | May change edge color and speed; use only if the machine supports it |
| Argon-hydrogen | Industrial and mechanized systems built for it | Cost, special cylinders and regulators; not for basic cutters |
| Pure oxygen | Not recommended for titanium or for handheld cutters | Feeds oxidation and can create a fire hazard |
If your machine does not list a gas, do not use it. The owner manual and cut chart control the choice.
Settings, Speed and Torch Setup
The heat-affected zone (HAZ) is the strip of metal beside the cut where heat has changed the surface and structure. On titanium, air exposure while hot can leave an oxygen-rich, hardened layer that is harder to machine and can reduce fatigue life.
- Non-critical brackets, art and demolition cuts can usually be used after cleanup.
- Aerospace, medical and load-bearing parts normally need the affected edge machined back; ESAB notes that post-cut machining is typically required for those applications whatever the cutting method.
- If a drawing or specification limits thermal cutting, follow it instead of this guide.
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Avoiding Oxidation and Contamination
There is no universal setting for titanium. Use the machine cut chart, and when titanium is not listed, ESAB suggests starting from the settings for stainless steel of the same thickness and adjusting after a test cut.
- Amperage: match it to thickness and the installed consumables.
- Travel speed: keep a steady, charted speed. Dwelling in one spot adds heat and widens the HAZ.
- Torch height: hold the standoff in the manual so the arc stays stable.
- Consumables: replace worn electrodes and nozzles before a titanium cut.
- Air quality: drain the compressor and use a filter or dryer.
Make a test cut on a scrap offcut of the same alloy and thickness, then change one variable at a time.
How to Plasma Cut Titanium Step by Step
Oxidation cannot be fully avoided with air plasma, but you can limit it:
- Keep the cut moving at the charted speed so the edge spends less time hot.
- Use a clean, dry gas supply and fresh consumables.
- Use a supported inert-type process only if your system is designed for it.
- Keep oil, solvents and paint off the cut area, and do not mix titanium scrap with steel dust.
- Remove the discolored layer afterward when the part is critical.
Safety Considerations for Cutting Titanium
- Identify the alloy and thickness. Confirm it fits within the recommended cut capacity of your machine, not its maximum severance rating.
- Prepare the area. Clear combustibles, set up fume extraction and have a suitable fire extinguisher for metal fires nearby.
- Install the right consumables and set amperage and air from the cut chart.
- Clamp the work lead to clean titanium close to the cut.
- Make a test cut on scrap and check penetration, dross and edge color.
- Cut at a steady speed with the torch square and at the correct standoff.
- Let the part cool, then inspect the edge and clean up dross.
Finishing the Cut Edge
Titanium creates hazards beyond those of mild steel:
- Fire: fine titanium particles, grinding dust and hot chips can ignite. Keep the work area free of dust build-up and keep a Class D extinguisher or other approved metal-fire agent within reach. Do not fight a titanium metal fire with water unless your site procedure says to.
- Fumes: use local exhaust ventilation and read the safety data sheet for the specific alloy.
- Arc, sparks and noise: use a proper plasma-cutting shade, flame-resistant clothing, gloves and hearing protection.
- Hot work rules: follow your workplace hot-work permit and fire-watch requirements.
See our plasma cutter safety rules and PPE checklist for the general setup.
Plasma vs Waterjet, Laser and Machining
Plasma leaves a rough, oxidized edge, so plan finishing:
| Method | Use it for |
|---|---|
| Grinding or flap disc | Removing dross and light surface oxidation |
| Machining or milling | Cutting back past the heat-affected layer on critical parts |
| Sanding or abrasive blasting | Cosmetic cleanup when strength is not critical |
Use abrasives reserved for titanium and control the dust, since fine titanium dust is a fire hazard.
Related guides: see what metals a plasma cutter can cut, plasma cutting aluminum, and the gases used for plasma cutting.
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Frequently Asked Questions
Can a plasma cutter cut thick titanium?
Yes, if the machine has enough output for the thickness. Use the recommended cut capacity rather than the maximum severance rating, and expect a rougher, more heavily oxidized edge near the limit of the machine.
What gas should I use to plasma cut titanium?
Clean, dry compressed air is the usual choice on handheld cutters and is the gas ESAB recommends for manual plasma cutting of titanium. Nitrogen or argon-hydrogen are options only on systems whose manuals list them.
Why does plasma-cut titanium turn blue or gold?
The hot edge reacts with oxygen and forms an oxide film. ESAB describes this coloring as normal with air plasma. If the part is critical, remove the affected layer by machining or grinding.
Is plasma cutting titanium a fire hazard?
It can be. Fine titanium particles, grinding dust and hot chips can ignite, so keep the area clean, remove combustibles and keep a Class D extinguisher or approved metal-fire agent available.
Is waterjet better than plasma for titanium?
Waterjet avoids the heat-affected zone and leaves a cleaner edge, so it suits precision or fatigue-critical parts. Plasma is quicker and cheaper when the edge will be finished or is not critical.
Do I need a special plasma cutter for titanium?
Not for general cutting. Most plasma cutters that can handle the thickness will cut titanium. Aerospace or medical work usually calls for a mechanized system and a qualified procedure.
Conclusion
A plasma cutter can cut titanium, and for many shop jobs that is enough. The trade-off is an oxidized, heat-affected edge that needs grinding or machining when strength or fit matters. Work from the cut chart, test on scrap, control dust and fire risk, and switch to waterjet or machining when the part cannot tolerate heat damage.
Sources
- ESAB: What Metals Can You Cut With a Manual Plasma Cutter? (titanium cutting with compressed air, oxidation, settings)
- Hypertherm: Understanding Plasma Cutting Attributes (metals plasma can cut)
- Hypertherm: Guide to Plasma Gas Selection (argon-hydrogen and nitrogen)
