TC4 is a titanium alloy, while TA2 is commercially pure titanium. Material selection should follow drawing, strength, environment and application requirements.
| Item | TC4 | TA2 |
|---|---|---|
| Material type | Titanium alloy | Commercially pure titanium |
| Typical direction | Higher-strength structural applications | Pure titanium and corrosion-related applications |
| Can they be substituted? | Not by default. Always confirm against drawing and application requirements. | |
Use the grade specified by the drawing whenever possible. If material selection is still open, review strength, environment, fabrication and end-use requirements before choosing.