My only experience with a Ti bike was a Moots mountain bike that a fellow mountain biker let me take out for trail ride, one day. Since my favorite frame has always been steel, I loved it. Has a similar ride quality but is even more bombproof than steel, if such a thing is possible.

If you're trying to add that last fraction of a mph to your average speed or squeeze max efficiency out of your bike with every pedal stroke, I think carbon is still the way to go. Definitely the lighter frame by the time you beef up the Ti to specs.

On long road rides on pavement, though, I much prefer a steel bike to my carbon Trek Domane 4.3. The carbon Trek rides butter smooth and I love how light it is, but I have less feel for the road with it than with a steel bike and, yet, when it comes time for handling road cracks, the steel doesn't hurt as much. Go figure. I suspect titanium would be similar. I think it would be the comfort and durability choice.