Originally Posted by
DCB0
From whom did you hear this and do you have good reason to trust his/her opinion?
I used to work for a company that had its own brand ouf Ti bikes manufactured, and the failure rate of the frames was much much lower than the aluminum bikes we sold. I have never before heard this statement about Ti becoming brittle. I got myself a Ti frame while I worked there and it is the only MTB frame I have ever had that has lasted longer than 2 years without breaking.
I have no reason to especially trust that person's opinion aside from he is in the bike business. There's a lot of "gas" going around-I've seen some here with folks saying that Ti frames have cracked on them. So I thought to ask the question directly.
FWIW I've seen nothing in the literature on this but I'm not a metalurgical engineer. having a bad weld is one thing- that's pretty common with bad technique.