Black titanium is specially treated titanium used exclusively for jewelry. Black titanium is particularly popular among wedding rings. The Spectore Corporation, located in Deerfield Beach, Florida, is the exclusive producer of black titanium using their own patented process.
Titanium is an incredibly strong and lightweight metal with a grayish color. The metal is scratch-resistant and hypoallergenic, making it a perfect choice for wedding bands--given that wedding rings probably see more use than any other form of jewelry among both women and men.
Changing the exterior color of the metal to black involves a carefully guarded manufacturing process that uses a special titanium alloy to permanently change the color of the titanium to a deep rich black.
Since black titanium is exceptionally durable and strong, it is extremely difficult to resize. Therefore, people whose ring fingers tend to fluctuate in size may want to avoid choosing black titanium--at least for rings.