Just bought an inexpensive baking pan hoping it would fit an old
toaster oven. Only $1, and it seemed decently made so took the chance.

I found it would fit by bending the flanges down along the short edges.
To my surprise, the pan, which had been quite flat on the bottom, developed
a sharp bistable twist. The bending was done freehand, using fingers alone.

Would holding the pan flat during the bend have avoided the twist, or is
the twisting intrinsic to deforming a drawn shape of this sort? Can a
twist be "tuned out" of a drawn shape? More pans are available if it's
necessary to start over. It's very easy to make the twist worse, but
making it better requires visualization skills I lack.

The pan is about 11 by 7 by 1 inch deep, the flanges I bent down were along
the 7 inch edges. The twist that resulted is close to half an inch.

Thanks for reading, and any ideas.

bob prohaska