I have a 58" 35# bear grizzley that I bought for $10 at a pawn shop, which had a twisted bottom limb.
I had heard that you could straighten it by twisting it under hot tap water, but that did not work. So, I put some water on the boil and held it in the steam for a bit then twisted the limb the other way and let it cool. It worked perfectly. I had to heat it way up by the handle to get it to work. When I heated the recurved tip, it didn't have any effect.
A pair of leather gloves will keep your hands from blistering.
Good luck...
Doyle