Friction　rolling　additive　manufacturing　(FRAM)　is　offers　an　effective　approach　for　producing　high-performance　aluminum　alloy　parts.　However,　achieving　ultrahigh-strength　aluminum　alloys　is　difficult　owing　to　the　softening　behavior　of　materials　during　solid-phase　deposition　and　abnormal　grain　growth　during　heat　treatment.　In　this　study,　a　strategy　for　improving　the　microstructure　and　preparing　ultrahigh-strength　aluminum　alloys　using　the　pinning　effect　of　TiC　nanoparticles　on　grain　boundaries　is　proposed.　The　results　show　that　compared　with　7075-aluminum　alloy,　TiC　nanoparticles　enhanced　dynamic　recrystallization　during　friction　roll　additive　manufacturing,　thereby　reducing　the　deposited　grain　size　from　3.13　to　2.60　mu　m　and　inhibiting　the　abnormal　grain　growth　during　heat　treatment,　thereby　reducing　the　grain　size　from　6.05　to　3.53　mu　m.　In　addition,　the　addition　of　TiC　nanoparticles　promoted　the　precipitation　and　refinement　of　the　eta＇-MgZn2　phase　during　heat　treatment.　A　7075-TiC　alloy　prepared　using　this　method　exhibited　excellent　mechanical　properties.　After　heat　treatment,　the　tensile　strength　(UTS),　yield　strength　(YS),　and　elongation　(EL)　were　626　+/-　15.0　MPa,　546　+/-　5.2　MPa,　and　15.5　+/-　0.5　%,　respectively,　achieving　a　good　synergistic　effect　on　strength　and　plasticity.　Precipitation　strengthening　played　a　key　role　in　enhancing　the　mechanical　properties　of　the　7075-TiC　alloy.