What are the classifications of surface treatment techniques for titanium?

# What are the classifications of surface treatment techniques for titanium?

Titanium surface treatment technology is mainly to improve the surface function of titanium, in order to meet the special requirements of the material, the main categories are:
Surface purification, namely to improve the surface cleanliness of titanium and titanium alloy.
Corrosion resistance surface treatment, namely to improve the corrosion resistance of titanium alloy surface.
Wear resistance surface treatment, namely to improve the wear resistance of titanium and titanium alloy surface.
Artificial surface treatment, that is, to improve the surface color of titanium and titanium alloy, or to meet some special needs of customers.