Magnesium and calcium phosphates composites are promising biomaterials to create biodegradable load-bearing implants for bone regeneration.The present investigation is focused on the design of an interpenetrated magnesiumtricalcium phosphate (Mg-TCP) composite and its evaluation under immersion test.In the study,TCP porous preforms were fabricated by robocasting to have a prefect control of porosity and pore size and later infiltrated with pure commercial Mg through current-assisted metal infiltration (CAMI) technique.The microstructure,composition,distribution of phases and degradation of the composite under physiological simulated conditions were analysed by scanning electron microscopy,elemental chemical analysis and X-ray diffraction.The results revealed that robocast TCP preforms were full infiltrated by magnesium through CAMI,even small pores below 2 μm have been filled with Mg,giving to the composite a good interpenetration.The degradation rate of the Mg-TCP composite displays lower value compared to the one of pure Mg during the first 24 h of immersion test.