The current study developed a simple rolling-type TMT to process the commerical 5083 Al to exhibit low temperature superplacticity at 230 and 250 oC, with optimum tensile elongation to 511% and 443%. The TMT processed thin sheet contained (sub)grains measureing 0.3 um. The bimodal of grain boundary misorientation distribution of as-TMT3 would be gradually replaced by a more random distribution if the alloy was subjected to increase TMT or tensile deformation strain level. It would be lost it's superplasticity when the testing temperature was higher than 270 oC. But it would exhibit superplasticity again when the thsting temperature was higher than 400 oC.