One guy's opinion: http://www2.sjsu.edu/orgs/asmtms/artcle/articl.htm and also here http://www.bohemianbicycles.com/materials%20science.htm

Some stuff on Aluminium: http://www.weldreality.com/aluminumalloys.htm and here http://www.brucescycleworks.com/tips/tip18.html

frame design rubbish: http://www.slowtwitch.com/mainheadin...amedesign.html and here http://www.ibike.org/library/bikeframe.htm

Wow, now I have frame building superpowers. Lookout Thylo...