In　this　investigation,　graphene　nanoplatelets　reinforced　pure　titanium　matrix　(GNPs/TA1)　composites　were　synthesized　via　short-term　ball　milling　followed　by　spark　plasma　sintering.　The　mechanical　properties　and　microstructure　evolution　of　these　composites　were　examined　under　both　quasi-static　and　dynamic　compression　conditions.　The　results　indicate　that　as　the　strain　rate　increases　from　10(-3)　to　3000　s(-1),　the　yield　strength　rises　from　436.9　MPa　to　1209.6　MPa,　consistent　with　the　positive　strain　rate　effect.　The　superior　yield　strength　of　GNPs/TA1　composites　arises　from　the　dynamic　Hall-Petch　effect,　dislocation　strengthening　and　load　transfer　strengthening,　with　the　contribution　from　load　transfer　strengthening　being　the　most　significant　due　to　the　reinforcement＇s　(TiC-GNPs-TiC)　facilitation　of　load　transfer.　As　the　strain　rate　increases,　interfacial　debonding　gradually　extends　along　the　reinforcement　and　grain　boundaries,　but　no　macroscopic　fracture　occurred　in　this　study.　At　a　strain　rate　of　3000　s(-1)　during　compression,　{11　(2)　over　bar2},　{101　(1)　over　bar2},　and　{11　(2)　over　bar1}　twins　were　generated.　However,　at　a　strain　rate　of　10　s(-1),　only　{11　(2)　over　bar2}　and　{10　(1)　over　bar2}　twins　were　produced,　while　{11　(2)　over　bar1}　twin　was　inhibited.　Under　high　strain　rate　loading,　the　plastic　flow　behavior　of　GNPs/TA1　composites　was　predicted　using　the　Johnson-Cook　constitutive　model,　modified　to　account　for　adiabatic　temperature　rise,　and　the　predictions　showed　good　agreement　with　experimental　results.