3，具有用作輕量化結(jié)構(gòu)材料的潛力。Mg-Ti復合材料的強度與未復合的Mg-9Al-1Zn（AZ91）合金基體相比提高了51%，這得益于Mg-Ti兩相緊密的冶金結(jié)合界面，促進了載荷的有效傳遞。此外，雙連續(xù)相結(jié)構(gòu)引起的相互約束效應(yīng)及鈦合金骨架中超細針狀α'-Ti馬氏體引起的細晶強化對力學性能提升也做出了重要貢獻。本研究采取的策略為復合材料的結(jié)構(gòu)輕量化發(fā)展提供了新思路。;Mg-Ti composite with bicontinuous phase structure was prepared by the additive manufacturing (AM) coupled with the melt infiltration. The effects of pore structure type and size parameters on the porosity and mechanical properties of AM-prepared Ti-6Al-4V (TC4) porous scaffold reinforcement were investigated. By adjusting the size parameters, both high porosity and appreciable compressive strength can be achieved for the scaffold. The strengthening effect of titanium alloy scaffold on the mechanical properties of Mg-Ti composite was investigated by analyzing the microstructure and interface bonding mechanism. Results show that the Mg-Ti composite has high compressive strength of 400 MPa, whereas its density is only 2.56 g·cm-3, presenting the potential as lightweight structural materials. The strength of Mg-Ti composite is higher than that of raw Mg-9Al-1Zn (AZ91) alloy matrix by 51%. This enhancement is attributed to the tight metallurgical bonding interface between the scaffold and the matrix, which promotes the effec-tive transfer of load. Additionally, the mutual constraint effect caused by the bicontinuous phase structure and the fine crystal streng-thening caused by the ultra-fine α'-Ti martensite in TC4 scaffold also significantly contribute to the improvement of mechanical pro-perties. The investigation strategy in this research provides a nouveau path for the development of structural lightweight composites."/>