Abstract: Apparatuses, systems, and methods for electrical field-assisted heterogeneous material printing (EF-HMP) of metal-polymer composite structure include a printing platform, a solution tank, an optical projection system, and an electrical field generation and control module. An additive manufacturing method for a metal-polymer composite structure includes preparing a photocurable electrolyte solution by mixing a photocurable liquid resin with a conductive nanofiller, a metal salt solution, a photo initiator, and deionized water. The method further includes initiating photopolymerization of the photocurable liquid resin to form a photocured polymer matrix by directing a projection of ultraviolet light energy from a light source onto the photocurable electrolyte solution. The method further includes depositing a metal structure onto the photocured polymer matrix. In this manner, both the photopolymerization and the metal electrodeposition are performed using the same photocurable electrolyte solution.