I have 10 year old Ti bike and a 1 month old carbon bike. The carbon is lighter, stiffer, and rides and handles better. Some of that is due to the material, and some due to the design, different wheels etc.. A lot depends on which specific frame you choose, not just the material. I also have a 6 year old Al Specialized Roubaix with carbon seat stays and fork and find the Ti bike to have a much plusher ride, though it is also more flexible in pedaling and handling.
The roads were sloppy with sand and salt yesterday so I rode my "old" Ti bike rather than the new C bike that I've been riding the past month. It was a great ride and I really enjoyed riding the ol' Ti bike again. There's absolutely nothing wrong with Ti, and if you like how the bike fits, feels, rides, and looks, by all means get it. If you want the absolute best most competitive racing machine, get carbon, IMO.
Last edited by Looigi; 01-02-11 at 07:22 AM.