Greetings,
Lately i've been looking into bike frame building. I've got a background in metal work and as such am a competent mig welder, and solder/brazer and i've done a small amount of TIG but have access to one and plenty of scrap to practice with.

Essentially, i'm curious as to the effects of welded joins on a bike. From what i'm familiar with the process and heat transfer generally causes the parent metal to soften in the area heated and can lead to stresses/cracks, etc. Is there a process of heat treatment/work hardening undertaken after joining to combat this?

I'm also assuming this is why there seems to be a preference to soldering/brazing and it's lower temperatures? Does this come with its own complications too?

Hope i've managed to explain myself properly, and cheers in advance for any and all answers!