We use a Durston roller with an electric drive for rolling.
(we used to do it by hand – but that takes quite some muscle…..)
Rolling is a process of pressure forming. Two rollers are used to press the metal, to roll it thinner.
When copper is rolled several times, a higher strength is achieved, and finally a resilient behavior, see the copper bracelet Daphne or the copper bracelet Ivaldi

here
…….example of the achieved elaticity after rolling, bracelet Ivaldi

.t.t.t.t……. that is too small for us……..