The　large　specific　surface　area　of　Cu　foam　was　used　to　manufacture　the　high-quality　of　graphene　without　crystal　defects,　and　the　graphene-reinforced　Cu　foam　(G-Cu)　was　introduced　as　an　interlayer　to　join　C/C　composites　and　titanium　alloy.　The　foam　net　structure　enabled　the　molten　filler　to　flow　into　its　pores,　reduced　the　aggregation　of　Ag-based　solid　solution,　promoted　the　uniform,　and　dispersed　distribution　of　various　phases.　Results　showed　that　the　joint　shear　strength　with　G-Cu　foam　interlayer　reached　50 MPa,　which　was　twice　about　directly　brazed　joint.　Due　to　the　isolation　and　protection　of　the　graphene　film,　the　three-dimensional　skeleton　structure　of　foam　kept　intact,　and　the　ability　to　relieve　residual　stress　was　more　fully　utilized,　thereby　further　improving　the　brazed　joint　strength.　©　International　Institute　of　Welding　2024.