Pitch　based　mixture　as　binder　material　is　crucial　component　for　structure　stability　and　mechanical　properties　of　carbon/graphite　electrodes.　In　this　work,　coal　tar　pitch　(CTP)　mixture　was　modified　by　additions　of　graphene　oxide　(GO)　precursor　and　fine　TiB2　particles.　It　is　found　that　1　wt.%GO　addition　increases　the　crystallite　size,　L-a　value　and　reduce　the　defects　density　of　(002)　planes　in　CTP　mesophase　and　carbonization　products　with　increased　elastic　modulus.　The　additions　of　3　or　5　wt.%TiB2　increase　the　stacking　height　of　(002)　planes　(L-c)　of　CTP　pyrolysis　and　carbonization　products　with　increased　edge　dislocation　density　and　ultimate　strain.　The　combined　additions　of　TiB2　and　GO　generate　a　synergistic　effect　on　further　improving　the　mechanical　properties　of　CTP　carbonization　products　with　increasing　the　stacking　order　of　(002)　plane,　crystallite　size　(L(a　&　nbsp;)and　L-c)　and　edge　dislocation　density.　CTP-1GO-5TiB(2)　shows　a　compressive　strength　194.7　MPa　higher　than　the　pure　CTP　(155.4　MPa).　Further　findings　suggest　that　a　combined　mechanism　of　GO　and　TiB(2　)additions　can　be　established　through　stabilizing　C-C　bonds　while　reducing　C-O　bonds　along　with　chemical　component　transformations　after　pyrolysis　and　carbonization.　TiB2　particles　play　a　key　role　in　making　the　synergistic　effect　on　improving　the　mechanical　strength　and　reducing　the　oxidation　of　C-C　bonds　with　additional　increase　in　L-a　value.