Metamaterials offer exceptional design potential across mechanical, thermal, and wave propagation properties beyond those achievable with conventional materials. Among them, auxetic structures, characterized by a negative geometrical Poisson’s ratio, have attracted significant attention for their unique deformation mechanisms, enhanced energy absorption, and tuneable mechanical responses. The rapid convergence of advanced computational methods, precision fabrication technologies, and high-fidelity experimental techniques now enables the integrated development of such materials from concept to application. This mini-symposium aims to provide a multidisciplinary forum for researchers, engineers, and practitioners engaged in the design, simulation, experimentation, and optimization of metamaterials and auxetic structures. Topics of interest include (but are not limited to): • Novel auxetic and non-auxetic metamaterial geometries • Topology optimization and generative design methods • Multiphysics modelling of coupled mechanical, thermal, and acoustic responses • Experimental validation techniques and advanced characterization • Additive manufacturing and scalable fabrication strategies • Data-driven design and machine learning approaches • Application-oriented metamaterials for aerospace, biomedical, protective, and energy systems By bringing together expertise from mechanics, materials science, manufacturing, and applied mathematics, this mini-symposium will foster dialogue on the integrated pathways from concept to implementation of metamaterials.