Sorry to be a party pooper. Cryo is what we call an irreversible process. Cryo makes the arrangement of the atoms more homogeneous during contraction/expansion phases of the process. The problem for metals that have been bent, rolled, drawn and or hammered is the crystal structure is very distorted.
While I do use metals in the GE, the carbon fiber and Graphene would be unaffected by the cryogenic process - other than to make the Graphene a virtually perfect conductor when frozen.
I wasn’t referring to the graphene or carbon fiber. Although now that I think about it, the performance of plastics and glass and many other non metal materials improves with cryo, so why not graphene and carbon fiber?