As the number of international conferences and publications has increased in recent years, heterogeneous structured (HS) composite has recently attracted extensive attention from the material community. HS materials have a wide variety of microstructures, including heterogeneous lamella structures, gradient structures, dual-phase structures, harmonic structures, and metal matrix composite. A wide variety of structures have common characteristics, all of which consist of hard material and soft material with dramatically different flow stress or strength. Recently, Kato-group announced the novel metallic porous and metallic composite fabrication method using a liquid metal dealloying (LMD) technique. The effect of dealloying steps; selective dissolution and self-assembly of the element formed a unique microstructure with a bi-continuous state. Furthermore, many types of research demonstrated that these bi-continuous materials have suggested extraordinary properties can be obtained by forming different structures from the noble microstructure.