steel doesn't anneal well .. you form it hot .. higher than the melting point of brass .. red-orange-yellow Hot

you may try taking it to a bike shop if not too bent , [sounds like you bought that tool]

the same beam tool that screws into the dropout to fine tune the allignment will also bend it back into place if not too far gone..

Like a fall over on the right side, bend..

other than that, saw it in half , so then you melt the brass in each tube, 1 At a time, and pull the halves out while the brass is molten .