**4. Conclusions**


(3) As the Li content increases, the tensile strength and hardness of as-homogenized Mg-*x*Li-3Al-2Zn-0.2Zr alloys decrease while the elongation increases, and the corresponding fracture mode changes from cleavage fracture to microvoid coalescence fracture. This is mainly ascribed to the matrix of alloys changing from α-Mg with an hcp structure to β-Li with a bcc structure.

**Author Contributions:** Conceptualization, G.S. and Y.S.; methodology, Y.S.; validation, F.Z.; formal analysis, Y.S. and J.R.; investigation, Y.S., F.Z. and Y.S.; resources, J.R.; data curation, F.Z.; writing original draft preparation, Y.S. and J.R.; writing—review and editing, J.R. and G.S.; supervision, G.S.; funding acquisition, Y.S. and J.R. All authors have read and agreed to the published version of the manuscript.

**Funding:** The authors are grateful for the financial support from the open project of the Key Laboratory of Green Fabrication and Surface Technology of Advanced Metal Materials (No. GFST2021KF04 and No. GFST2021KF09), the University Natural Science Research Project of Anhui Province (No. KJ2021A0394 and No. KJ2021A0395), and Anhui Provincial Natural Science Foundation (No. 2208085QE124).

**Data Availability Statement:** The raw data required to reproduce these findings cannot be shared at this time as the data also forms part of an ongoing study.

**Conflicts of Interest:** The authors declare that they have no known competing financial interest or personal relationships that could have appeared to influence the work reported in this paper.
