Since I haven't met your specific target, here are some suggestions for your reference. If the curvature of your workpiece is not too great, you can clamp the workpiece in a vise and manually apply force in the opposite direction of bending to straighten it, or put it on a suitable platform and beat it with a copper hammer to deform it. If there is a dead bend, you can directly clamp the bent part with a vice. In the case of cold working and hardening in the above processing, it can be annealed with a blowtorch before processing until the required processing accuracy is achieved.

If your workpiece has been quenched, it should be annealed before processing. The bending part can be heated to dark red and straightened one by one with a copper hammer, so that the mechanical properties of the workpiece can be restored.

Here is for your reference, and another reminder is to pay attention to the safety of operation, thank you.