jac, doug is an airplane mechanic and he works with heavy machinery all day long, he LOVES his titanium band, it is super lightweight and still very strong at the same time. we got him 4 different ones and he is wearing the black one right now, it scratches pretty good (but it's not the ring, just the black color that is scratching off, moslty from opening beer bottles in cabo hahaha), but he likes it better than the plain silver ones.
anyways, titanium is actually what airplane skins are made of, so you know it's tough stuff!
ahhhhhh, and in case you havent, check out Wholesale Sterling Silver Jewelry | Titanium | Stainless Steel | Fashion Jewelry for titanium bands, they are like $5 and thats why we got 4. the EXACT same band is at the jewelers we got my ring from and it is $170, but we paid like $5.50 or something for his black one.