Black Titanium is trademarked by Edward Mirell. It was initially developed by them for use inside the body. This makes it a great metal for anyone with allergies. It's 100% hypo-allergenic. Very lightweight and very tough. The black is scratch resistant. Although, not scratch-proof. The black surface goes about 20% through to the core. The core of the ring is gray titanium. The black is not a coating. It is a reaction to the heating process done by the manufacturer. If your black titanium ring scratches it can be refinished.