Cool stuff TB! Have you tried it on any Ti? I have a system myself that I used on some brass LED fixtures but I never did any flashlights that I recall. I've wondered about coating Ti but question the effective adhesion to the metal. Probably a good blasted surface might provide sufficient mechanical bond but I wonder. :thinking:
I have done mostly aluminum, some steel, but no Ti. I would guess the adhesion would be the same as other metals. Any surface roughness will give better adhesion, the powder melts to form the finished surface.