[koolba]

Not a physicist, but I’d guess that bending the metal causes it to heat up, which in turn could make it easier for electrons to align and respond to magnetic waves.

[Tuna-Fish]

Nope, heating would make it non-magnetic again.

It's the act of physically working it that makes it change structure.

[Keyframe]

you're only right about not being a physicist. sorry, had to have a laugh. What made you draw that conclusion?