Abstract: A process for superplastically forming and shaping a solid object including 123 superconductor, including preparing a solid object having grains of 123 superconductor that have an average grain size of less than 10 microns, and superplastically deforming the prepared solid object by heating the solid object to between 500.degree. and 1015.degree. C. while simultaneously applying to said solid object stress which is less than the fracture strength of the solid object, thereby producing a strain rate in the solid object. The solid object may be a composite including silver or gold.