My rings also need to be hardened up a bit, but I usually just
work them until they start getting uncooperative. Can you flex
the braid a bit without altering the ring too much? I’d have to
see your work to be able to advise you for sure.
I just finished a ring that is made with Peach Gold (Reg.
Hoover&Strong) and palladium white gold, all 18K, and it was
quite malleable for a long time. I changed it back and forth
between size 13 and 16 at least a dozen times before it started