Ive read about a lot of people using it. So I tried it on a savage FP10 .223 almost 2 years ago and haven't had a problem with it yet.
Why not do it right the first time with the right product? I just finished four Rem 700P rifles using what I consider the best bedding compound, Devcon Steel Bedding Putty. I would use JBWeld to bed a small area like bedding the scope base, but not for larger areas like a stock.
Just a suggestion from my experience.
Devcon Ti is tougher to work with as it is higher viscosity when mixed. It really offers no advantage over steel Devcon, Steelbed, etc.
JB Weld is higher viscosity than both of them, and would simply be tougher to work when bedding an action.