• Laser powder bed fusion successfully fabricated Cu-11.85Al-3.2Mn-0.1Ti TPMS structures (Gyroid, Diamond, Primitive) with high surface quality and uniform pores, though minor dimensional deviations (<1.6% for Gyroid and Diamond) were observed.
• Diamond TPMS structures exhibited the best energy absorption (7.6 MJ/m³) and highest first fracture stress (164.67 MPa) and strain (13.89%), while showing the lowest yield strength (61.97 MPa).
• Finite element simulations accurately predicted the fracture behavior: Gyroid and Diamond structures fractured at 45° direction, whereas Primitive structures fractured horizontally, matching experimental observations.
• Diamond structures demonstrated the highest superelastic strain (up to 3.53%) with all samples showing superelastic recovery between 63.5% and 71.5%, highlighting their potential for energy-absorbing and shape-memory applications.