[Dizzy-Dick]

If you put heat on it, be carefull not to over heat it, aluminum has a low melting point. If you can get access to the inside of the tube, pack it full with sand to prevent any crimping when bending.

If it is crimped badly, just cut it in two pieces and solder a sleeve on it. If you can't find an aluminum sleeve to fit, try copper. The plumbing section of your hardware store should have something close.

Good luck on fixing it. Let us know how it worked out,