Molybdenum　and　its　alloys　are　known　for　their　superior　strength　among　body-centered　cubic　materials.　However,　their　widespread　application　is　hindered　by　a　significant　decrease　in　ductility　at　lower　temperatures.　In　this　study,　we　demonstrate　the　achievement　of　exceptional　ductility　in　a　Mo　alloy　containing　rare-earth　La2O3　nanoparticles　through　rotary-swaging,　a　rarity　in　Mo-based　materials.　Our　analysis　reveals　that　the　large　ductility　originates　from　substantial　variations　in　the　electronic　density　of　states,　a　characteristic　intrinsic　to　rare-earth　elements.　This　characteristic　can　accelerate　the　generation　of　oxygen　vacancies,　facilitating　the　amorphization　of　the　oxide-matrix　interface.　This　process　promotes　vacancy　absorption　and　modification　of　dislocation　configurations.　Furthermore,　by　inducing　irregular　shapes　in　the　La2O3　nanoparticles　through　rotary-swaging,　incoming　dislocations　interact　with　them,　creating　multiple　dislocation　sources　near　the　interface.　These　dislocation　sources　act　as　potent　initiators　at　even　reduced　temperatures,　fostering　diverse　dislocation　types　and　intricate　networks,　ultimately　enhancing　dislocation　plasticity.