To　address　the　problems　of　insufficient　strength　and　low　hardness　in　pure　titanium,　a　new　Ti-B-C　powder　system　was　used　to　prepare　in-situ　hybrid　reinforced　(TiB　+　TiC)/Ti　composites　by　laser　powder　bed　fusion　(LPBF)　technology.　The　influence　of　different　TiB/TiC　ratios　on　the　hybrid　reinforcement　was　investigated.　When　the　TiB/TiC　ratio　is　1:1,　the　best　hybrid　reinforcement　effect　is　achieved　and　the　mechanical　interlocking　structure　is　formed　between　TiB　and　TiC.　The　structures　enhance　the　strength　of　(TiB　+　TiC)/Ti　composites　significantly.　Subsequently,　the　microstructures　and　mechanical　properties　of　(TiB　+　TiC)/Ti　composites　were　investigated　by　adjusting　different　TiB　+　TiC　contents.　As　the　TiB　+　TiC　content　increases,　the　grains　are　refined　significantly　and　transform　into　equiaxed　grains　eventually,　the　preferred　orientation　disappears.　When　the　TiB　+　TiC　content　is　too　high,　severe　agglomeration　of　TiB　+　TiC　occurs,　resulting　in　less　noticeable　improvement　in　strength　and　a　rapid　decrease　in　plasticity.　Finally,　the　heat　treatment　of　(TiB　+　TiC)/Ti　composites　was　carried　out.　TiB　and　TiC　are　uniformly　distributed.　TiC　coarsens　significantly,　and　TiB　exhibits　a　dual-scale　effect.　The　higher　the　heat　treatment　temperature,　the　more　favorable　it　is　to　improve　the　plasticity　of　titanium　matrix　composites　(TMCs).　The　TMC2　after　HT950　has　a　tensile　strength　of　879　MPa　and　an　elongation　of　11.7%,　exhibiting　excellent　comprehensive　mechanical　properties.