Design and Experimental Study of a Novel 3D Hybrid Metamaterial with Enhanced Stability and Energy Absorption Capacity

3D auxetic metamaterials have gained increasing attention due to their superior energy absorption and low relative density. However, a trade‐off between auxeticity and energy absorption remains challenging in existing designs, particularly those derived from conventional re‐entrant (Re) and chiral (Ch) topologies. This work proposes a novel 3D re‐entrant structure (TRS), in which Ch lateral ribs are innovatively embedded into Re cells to enhance load transfer, suppress global buckling, and maintain stable auxetic behavior. The structure is evaluated through quasi‐static compression tests, theoretical analysis, and finite element simulations. The TRS exhibits a plateau stress of 6.25 MPa and a specific energy absorption of 7.35 J g⁻¹, which are approximately twice and 90% higher, respectively, than traditional Ch and Re structures. Notably, the TRS achieves this performance while preserving a distinct auxetic response throughout deformation. This study presents a geometrically integrated design that surpasses prior hybrid auxetic models by combining large Re angles and embedded Ch constraints, offering a promising pathway for high‐performance energy‐absorbing applications.