There are many type of Grades for Titanium rings, but the most popular ones are an Grade 5, and the Grade 2. Now your asking yourself, what is the difference between those 2, i have briefly explained below regarding about the two same titanium, but totally different meanings. Aerospace Grade 5 Titanium is the most common grade. It is the workhorse of the titanium industry. Grade 5 titanium is an alloy (90% titanium, 6% aluminum, 4% vanadium) and is harder than CP grade, with a tensile strength of over 130,000 psi. Grade 5 is tougher because of its greater hardness and alloy composition. When anodized, aerospace grade titanium colors are slightly more vibrant than CP grade titanium colors. Most people select the Aerospace Grade Titanium for their ring. Commercially Pure Titanium is 98.99% pure, unalloyed titanium. This grade is softer than the Aerospace Grade 5, (but still harder than gold) and has a tensile strength of over 40,000 psi. Either grade of titanium makes an attractive, strong, lightweight ring. Both grades are nickel free and won’t provoke allergies. Titanium, like all jewelry metals, will acquire surface scratches or scuffs through everyday wear. Scratches will be particularly evident in new ring, but as the ring is worn it develop a natural, even satin patina over the entire surface. Learn how to care for your titanium ring. Hollywood Body Jewelry carries a wide variety of Titanium rings for a very low price, Wholesale Only!