The mechanical properties and microstructures of 6013 alloy after different ther-momechanical treatments were investigated. The detailed dislocation configurations after deformation and morphologies of age hardening precipitates were examined through transmission electron mi-croscopy (TEM). The experimental results show that the thermomechanical treatment can significantly enhance the strength of 6013 alloy, and has a similar influence trend on single and two-step aging behaviors. With the increasing deformation ratio, the peak-hardness (HV_( max)) increases, the time toHV_( max) shortens, and the density of tangled dislocation network increases. The aging precipitates be-come larger and inhomogeneous by applying thernomechanical treatment.