The abbreviation for Titanium is Ti. The Ti-bone is a tip extension for the Ti-Tack or Ti-ce Pick. The Ti-bones have a lock hole at the base so you can put a smaller tool through it and tighten it down so it will not come loose. The Ti-bone weighs .7oz/ 20gr. The anodizing on Titanium will change colors with body oils and is only a couple microns thick. It will wear off over time, or with rough treatment.