The strength of Al-Li alloy was improved with increasing solubility of Cu in 2A97Al-Li alloy by the near-rapid solidification technology.The mechanical properties of Al-Li alloys with different Cu contents were analyzed by tensile testing.The microstructure of Al-Li alloys with varied Cu content was observed by optical microscopy（OM）

scanning electron microscopy（SEM）

electron diffraction and energy spectrum（EDS）.The results reveal that the tensile strength of the alloy is increased firstly and then decreased with increasing in Cu content.The fracture mode of the alloy is characterized by brittle fracture.And the distribution and proportion of strengthening phase includedθ′

S′andσin alloy can be changed

resulting in the reduction homogenization treatment effect.When the Cu content is 3.51% or4.52%

the homogenization treatment exhibits desirable.However

when the Cu content reaches7.51%

eutectic segregation occurs

and then the effect of homogenization is not obvious.There exists some bulky phases

leading to a decrease of the tensile strength of the alloy.