Depending on what the uses are, Titanium parts have treated services.

Probably anodizing or some sort.

This creates a very hard surface layer and prevents wear.

But, you don't want to remove this surface layer.

This is why you don't clean a Titanium cylinder with a brass bore brush. Best use a nylon brush for cleaning.

I suppose after you chamfer a Ti cylinder there would be some way to re-apply the hardened coating to the newly exposed metal, but this would likely require special equipment.