Abstract.Developing metallic materials with heterogenous nanostructures is one of the most promising strategies for obtaining excellent integrated mechanical properties towards structural applications. To explore the possibility of realizing intentional structural heterogeneities in graphene/metal composites, herein, we demonstrate a novel copper composite reinforced by three-dimensional network-like graphene powders, achieved by hot-pressing, cryo-rolling and low-temperature annealing. It was f...