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Can Ti be cold set?...(6 posts)

Can Ti be cold set?...TFerguson
Sep 5, 2003 6:05 PM
Can you cold set Titanium like steel or will it buckle like aluminum?
Sep 5, 2003 6:47 PM
Conventional wisdom on Ti is that is has a strong "memory." Try to cold set it and it will just return to its original position and shape. I've never tried it, but I've read for a decade that it can't be done properly.
I think it can to some extentNessism
Sep 5, 2003 10:01 PM
I've read posts on the framebuilders forum where Ti builders have talked about their alignment tables made out of large slabs of steel and using long pry bars to align frames. From what I understand, it takes much effort because the frame just wants to go back to the origional position. Can be done though to some extent.

I think it can to some extent (KEY WORDS:SOME EXTENT)Ironbutt
Sep 6, 2003 3:16 AM
It can be done, but it is not an easily acquired skill and takes a great deal of both strength and perseverance. Also, it depends on the alloy used to construct the frame.Commercially pure Ti frames are not too difficult to "cold set." 3al/2.5v frames are difficult. 6al/4v frames are MUCH more difficult, but not impossible. That's one of the reasons that some builders use a proprietary alloy for the dropouts, so that they are able to be straightened with normal shop tools if damaged.
Proprietary alloy = CP gradeNessism
Sep 6, 2003 10:34 AM
Some Ti builders use commercially pure Ti for dropouts for just the reason mentioned - earier to straighten. Also, the CP dropouts allow the skewer to bite-in better which is important if some sort of horizontal dropout is employed.

Proprietary alloy = CP gradeIronbutt
Sep 6, 2003 11:38 AM
True, some builders use commercially pure titanium for their dropouts for the reasons given. But the physical and working characteristics of commercially pure and alloyed titanium are quite different. And I've worked on enough frames to have learned that commercially pure does not equal proprietary alloy.