The microstructure and mechanical properties of 5083 seamless tube at different positions were analyzed by optical microscope,scanning electron microscope,X-ray diffractometer and room temperature tensile test.The influence of non-uniform deformation due to extrusion on the microstructure and mechanical properties was studied.Experimental results show that the non-uniform deformation of seamless tube extrusion has significant influence on the microstructure,the surface layer is completely recrystallized,the T/4 and T/2 positions are dominated by deformed structures and show partial dy-namic recrystallization,the texture types of T/4 and T/2 positions are basically the same,the texture strength at T/4 position is significantly higher than that at T/2,the tensile mechanical properties of T/4 and T/2 positions are basically the same.
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