I'm 6"3 and 250 lbs and am a big powerful guy. I've been riding high end road bikes for 30 plus years and have owned just about everything. I have had a Moots VaMoots going on 5 years or so and love it. I expect I will have it for a very long time. No reason at all that big guys can't ride Ti. I like seeing steel make a comeback but good Ti frames have a special ride quality, they don't corrode, they don't chip or ding, and they are still pretty light which is not a big issue for me but nice to have.