A　novel　method　for　preparing　or　repairing　titanium-clad　steel　plates　is　proposed　in　this　paper.　Molten　titanium　powder　is　deposited　onto　the　surface　of　Q235　steel　using　plasma　transferred　arc　powder　surfacing,　creating　metallurgical　bonding　of　Ti/steel　dissimilar　metals.　The　influence　of　welding　current　and　welding　speed　on　the　appearance,　microstructure,　and　mechanical　properties　of　the　titanium-clad　steel　plate　was　studied.　The　results　showed　that　welding　parameters　directly　affect　the　heat　input　of　the　titanium　surfacing　layer　during　welding,　changing　the　microstructure　and　strength　of　the　titanium　surfacing　layer.　In　the　low　heat　input　mode,　the　interface　microstructures　consist　of　a　TiFe　layer　and　a　TiFe2　layer.　With　increasing　heat　input,　the　phenomenon　of　intermetallic　compound　separation　at　the　interface　disappeared.　Additionally,　the　surfacing　was　covered　by　a　layer　of　eutectic　structure　instead　of　the　ideal　pure　titanium.　The　brittle　phase　is　the　main　factor　limiting　the　shear　resistance　of　titanium-steel　welded　joints.　Under　the　shear　load,　the　joint　cracks　mainly　initiated　in　the　intermetallic　compound　region　and　fractured　with　a　brittle　mode.　The　maximum　shear　strength　was　142.05　MPa.　Based　on　the　analysis　of　interface　microstructures,　the　bonding　mechanism　of　titanium-clad　steel　plates　made　by　PTA　powder　surfacing　was　revealed.