**4. Conclusions**

This paper investigates the effects of heat treatment on the microstructures and mechanical properties of forged TA15 titanium alloy sheets using SEM, XRD, and microhardness characterization. Bending, impact, and tensile tests were performed to analyze the impact of different heat treatments on the strength and toughness of the alloy. Based on the results, the following conclusions are drawn:


**Author Contributions:** Conceptualization, L.L.; methodology, L.L., X.P., B.L. (Biao Liu) and B.L. (Bin Liu); software, X.P.; validation, L.L. and P.L.; formal analysis, P.L.; investigation, P.L. and Z.L.; resources, L.L.; data curation, L.L.; writing—original draft preparation, L.L.; writing—review and editing, L.L., X.P., B.L. (Biao Liu), B.L. (Bin Liu), P.L. and Z.L.; visualization, X.P. and B.L. (Bin Liu); supervision, P.L. and Z.L.; project administration, P.L.; funding acquisition, L.L. All authors have read and agreed to the published version of the manuscript.

**Funding:** This work was supported by the National Science and Technology Major Project (2017ZX04001001), the Key Laboratory of Vibration and Control of Aero-Propulsion System, Ministry of Education, Northeastern University (No. VCAME202208), the National Science Foundation of Jiangsu Province (No. BK20210758), China Postdoctoral Science Foundation Funded Project (No. 2022M710060) and Postgraduate Research and Practice Innovation Program of Jiangsu Province (Nos. KYCX22\_3626 and SJCX22\_1849).

**Conflicts of Interest:** The authors declare no conflict of interest..
