dalava, did you have a carbon fork on your Ti bikes?
i have an old merlin road and I think the fork is aluminum. It's like the worst of all worlds. I ended up abandoning it for a carbon frame because the BB on those old Ti frames was decidedly noodly. I got significant chainrub every time I got out of the saddle. newer models should have a beefier BB so it probably isn't a concern.
I love my carbon bike. i did enjoy my Ti bike, even with its flaws.