We　developed　a　simple　method　of　in-situ　synthesize　carbon　nanotubes　(CNTs)　on　Ti-6Al　-4V　(TC4)　alloy　powder　to　fabricate　CNTs/TC4　compound　powders　through　plasmaenhanced　chemical　vapor　deposition　(PECVD).　By　this　approach,　CNTs　on　TC4　alloy　powder　exhibit　better　uniform　dispersion　and　morphology　compared　with　the　traditional　CVD　methods.　In　order　to　reveal　the　growth　behavior　of　CNTs　during　the　PECVD　process,　XRD,　SEM,　TEM,　and　Raman　spectroscopy　were　used　to　analyze　the　morphology　and　graphitization　of　CNTs　at　different　synthesis　conditions.　The　plasma　is　benefit　to　the　pyrolysis　of　CH4,　but　overmuch　plasma　bombardment　also　reduces　the　yield　and　quality　of　CNTs.　The　number　of　CNTs　can　be　significantly　improved　with　appropriately　increasing　the　temperature　and　time,　but　excessive　temperature,　time　and　carbon　concentration　can　increase　the　number　of　impurities　such　as　amorphous　carbon.　Significantly,　the　growth　mechanism　of　CNTs　synthesized　in　TC4　powders　is　following　tip-growth　mode　in　PECVD　process.　Additionally,　the　quantity　and　quality　were　satisfactory　at　600　&　DEG;C　for　30　min　with　50　W　plasma　power.　This　study　about　PECVD　process　lays　a　foundation　for　improving　the　comprehensive　properties　of　CNTs/TC4　composites　in　the　future.　&　COPY;　2023　The　Authors.　Published　by　Elsevier　B.V.　This　is　an　open　access　article　under　the　CC　BY-NC-ND　license　(http://creativecommons.org/licenses/by-nc-nd/4.0/).