The　mechanical　behavior　and　properties　of　materials　under　extreme　conditions　have　always　been　the　focus　of　materials　science　research,　as　they　determine　the　stability　and　safety　of　various　application　settings.　The　extreme　conditions　of　the　hypergravity　environment　have　long　been　simplified　to　conventional　stress　conditions,　and　their　actual　effect　on　the　mechanical　behavior　and　properties　of　materials　remains　to　be　verified.　Here　we　specifically　delve　into　the　mechanical　properties　of　CuZn　alloys　subjected　to　hypergravity　conditions.　Notably,　we　observe　a　decrease　in　both　modulus　of　elasticity　and　hardness　as　hypergravity　stress　and　gradient　stresses　intensified.　Intriguingly,　similar　degradations　in　mechanical　properties　are　evident　in　CuZn　alloys　exposed　to　gradient　stresses　under　normal　gravity,　deviating　from　the　typical　work　hardening　response　under　standard　stress.　This　anomalous　behavior　is　proposed　to　stem　from　the　heightened　dislocation　mobility　facilitated　by　stress　gradients　and　hypergravity,　which　subsequently　diminishes　the　dislocation　hardening　effect.　Our　findings　offer　valuable　insights　into　the　mechanical　behavior　of　materials　under　hypergravity,　enhancing　our　comprehension　of　how　materials　evolve　mechanically　in　extreme　environments.　©　2025　Acta　Materialia　Inc.