Titanium is a very strong metal, stronger than stainless steel and almost twice as light.
Titanium does not react with the body, so most people; even those with metal-sensitivities can wear Titanium. We use grade 23, which is implant grade; the same material the medical industry uses for joint replacements as well as pins and rods. No higher qualification exists.
Titanium can be coloured using a process called anodizing. Anodizing is a fast and simple electrical process that grows very thin transparent oxides on the surface of the reactive metals. There are no pigments or dyes, the Titanium surface makeup is altered therefore this colour cannot 'chip' or 'wear away'. It takes high voltage to produce the colours; different voltages give you different colours.