Originally Posted by
delcrossv
I've found a titanuim framed trike for my wife (who can't balance a two wheeler) and in asking around I got this response:
"But titanium ages (becomes brittle) and it might be hard to find someone who can weld titanium."
There's all sorts of nonsense said about all frame materials. Ti is used in some extremely harsh environments, and holds up very well there, surpassing even the best steel alloys.
However there is some truth in the issue of welding being more difficult than either steel or aluminum, so that might be a factor if you're planning lots of modifications.