Spinodal phase decomposition has been used to generate architected materials by interpreting one phase as solid, and the other phase as void. These spinodal architected materials present interesting mechanical properties, such as high energy absorption, insensitivity to imperfections, superior mechanical resilience, and high stiffness-to-weight ratio. Furthermore, by controlling the phase separation, i.e., controlling the proportion of materials, and/or imposing preferential directions in the decompositions, one can control the density, and preferential directions effectively tuning the strength, weight, and anisotropy of the resulting architected material. Another interesting property of spinodal materials is the capability to seamlessly transition between different classes, orientations, and densities, thereby enabling the manufacturing of effectively multi-material structures.