I see many different types of Ti bikes with different materials and had some questions which I'm hoping framebuilders gurus can chime in on.

Regardless of brand, which type would be stiffer and why?

3AL/2.5V

vs.

6Al/4V

i'm looking to get a Ti road bike frame and wasn't sure which material would be better as i don't want it to end up riding like a noodle. comfort is one thing, but i'll be putting her through some climbs, so would prefer the overall frame and BB to be stiff.

much appreciated...