This paper proposes a rapid and effective method for alloy material design using data transfer learning. A new aluminum alloy (E2 alloy) with ultra-strength and high toughness is used as an example. By transferring process-property relationship data from existing AA7xxx aluminum alloys, an optimal three-stage solution-aging treatment (T66R) was designed. This treatment significantly improved both the strength and plasticity of the E2 alloy, demonstrating the effectiveness of data transfer learning in alloy design.