Titanium wedding bands are ultra light and super durable. It feels as light as plastic. Yet, it is one of the toughest metals available, especially for wedding bands. Most of the titanium rings are comfort fit. That means they are rounded on the inside and slide right over the knuckle. Titanium and black titanium are inert. Therefore, it's hypo-allergenic and 100% bio-compatible. Titanium is the best material for anyone with sensitive skin. Black and gray titanium are available with different designs and inlays as well.