This　study　proposes　and　realizes　the　synthesis　of　powder　and　bulk　Ni-Co-Mn-Ti-based　all-d-metal　Heusler　alloys　through　mechanical　alloying　and　powder　metallurgy.　Ti　deficiency　was　found　and　recognized　as　a　critical　factor　for　the　phase　formation　in　similar　compounds.　By　adjusting　the　Ti　content,　alloying　and　heat　treatment　process,　L10,　B2,　and　5　M　martensitic　phases　can　be　obtained.　Martensitic　phase　transformation　temperatures　can　also　be　adjusted　through　various　factors　involved　in　the　process.　The　absence　of　a　metamagnetic　transition　up　to　3　T　was　observed　in　the　bulk　samples,　which　is　related　to　the　small　magnetization　difference　during　the　phase　transformation.　A　maximum　magnetic　entropy　change　comparable　to　alloys　produced　via　rapid　quenching　was　achieved.　The　present　method　is　an　effective　and　flexible　route　to　fabricating　powders　of　all-d-metal　alloys　with　tailored　structural　and　magnetic　properties.　It　can　serve　as　a　pre-process　for　advanced　manufacturing　and　provide　new　phase　control　choices　in　related　systems.