In　traditional　welding　processes,　the　electrode　and　the　work-piece　serve　as　the　two　terminals　of　the　arc,　cathode　and　anode,　respectively.　In　addition,　their　heat　and　mass　inputs　are　coupled　and　unable　to　be　freely　optimized　to　suit　for　the　needs　from　specific　applications.　A　modified　arc　welding　process　is　thus　proposed　in　this　work　to　establish　a　cross　arc　process　where　two　wires　are　charged　by　a　second　power　supply　and　are　fed　into　the　main　arc　(gas　tungsten　arc　(GTA)　or　plasma　arc　(PA))　which　heats　the　work-piece.　An　inter-wire　arc　can　be　established　between　the　two　wires　to　heat　both　wires　directly.　The　heat　and　mass　inputs　are　decoupled.　A　high　speed　camera　is　used　to　analyze　the　metal　transfer　behavior.　The　main　arc　swings　regularly　among　the　two　wires　as　the　alternating　inter-wire　arc　current　switches　its　priority:　the　main　arc　deviates　to　the　cathode　of　inter-wire　arc.　The　main　arc　is　deviated　by　the　Lorentz　force,　which　is　generated　by　the　inter-wire　arc　current.　The　PA　force　and　the　aerodynamic　drag　force,　thus　automatically　acts　on　the　droplet　on　the　cathode　wire　to　provide　an　additional　detachment　force.　The　parameters　of　the　two　coupled　arcs　can　be　adjusted　separately　to　provide　the　needed　deposition　rate,　force　and　heat　input　freely　as　the　capability　to　increase　the　productivity　while　maintaining　the　base　metal　heat　input　at　a　desired　level.　Therefore,　this　new　innovative　hybrid　arc　welding　process　can　be　used　for　overlaying　by　the　new　heat　transfer　mechanism.