I went for a titanium wedding band. I first read about a bike frame builder who made one from offcuts. A good titanium bike frame might be $2000. The ring cost us $300 for about 1000th as much material.
When we were looking for rings the jeweler showed me his and he had it made out of Tungsten. He mentioned that it was one of the hardest materials next to diamonds. It was heavy too! I was thinking Titanium as well but he said it would scratch fairly easily and couldn't be polished like Gold or Silver. Is this the case as you have found it to be? I would dig a Ti band as I'm a serious mnt. bike racer. P.S. a nice Ti frame can run as much as $5000.00 or more!