** NOTE: CONTACT US WITH RING SIZES AFTER PURCHASE THROUGH AMAZON'S EMAIL SYSTEM: After you place your order, login to your Amazon account. Then, under the "Your Account" drop down menu located on the top right area, select "Your Orders". All your recent orders will be shown. Go to your order from us and click on the "Contact Seller" button on the right. Follow the instructions given. ******************** Titanium is the only element possessing the strength of steel, yet with a weight comparable to aluminum. Titanium is the only element that offers the unique combination of beauty, strength, light weight and bio-compatibility. Like Tungsten Carbide, Titanium also has a dark metallic color, but is extremely lightweight. They are extremely bio-compatible because of its tissue compatibility and its elastic attributes, and hypoallergenic. Titanium, like Tungsten Carbide, will NOT bend, however, in the event of an emergency; a ring can be removed by a medical professional. Although it possesses a great tensile strength, titanium is susceptible to scratching and showing wear.