Originally Posted by fecual
Doesn't tell me much, take youre grinder and hit it the sparks are a brilliant white.
Titanium once exp[osed to the atmospher, a pasivated coating forms almost imediatly, if you do not own a grinder take something sharp and scibe a gouge into the metal the newly eposed metal will form a pasivsated coating almost imediatly.
Another thing stainless steel will become slightly magnetic at a weld or cut zone if you had made the cut with a plasma torch or simply melted a glob as you have using your tig the metal if it is stainless would become magnetic. Titanium does not share this trait.
Type III Color Anodize
Techmetals Type III color titanium anodize (TM- MedaDize Color) produces an oxide layer of variable thickness. This oxide layer reflects and refracts light waves which in turn cause the perception of color to the human eye. Color perception is caused by light interference between the oxide layer and base metal. Observed color is based on the thickness of the TiO2 “oxide” layer that grows during the anodize process. Since the oxide layer thickness can be controlled a wide array of colors can be produced without the use of dyes. Interference color wavelengths are formed by the refraction of light off of and through the thin titanium oxide layer. It is not the oxide itself that is perceived by the viewer, but its effect on light waves.