My mom has a set of bangles (bracelets) made of gold like the ones shown in the picture. Problem is the size (diameter) of these bangles is a bit more than required. If she goes to a goldsmith he cuts a piece from the bangle and rejoins the ends.
My idea is: why not put it under ice for a a significantly long time so that the compression induced due to cold is permanent and won't be undone at the room temperatures (27-32 degrees centigrade). But I'm also bit skeptical because I don't know what I don't know. Will this work? I know gold is relatively inert but does it anyway get affected by ice? Will the reduction in size be uniform? or is there a possibility of uneven deformation? Is there any other way it can be done using physics?