*Article* **Fabrication and Properties of Zn-3Mg-1Ti Alloy as a Potential Biodegradable Implant Material**

**Shuo Zhang, Pengkai Yuan, Xin Wang, Tiebao Wang, Lichen Zhao \* and Chunxiang Cui \***

Key Laboratory for New Type of Functional Materials of Hebei Province, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300400, China; zskln1996@163.com (S.Z.); ypk1079420647@163.com (P.Y.); ahaxin@hebut.edu.cn (X.W.); wtb@hebut.edu.cn (T.W.) **\*** Correspondence: zhlch@hebut.edu.cn (L.Z.); hutcui@hebut.edu.cn (C.C.)

**Abstract:** A Zn-3Mg-1Ti alloy was fabricated by ultrasonic treatment of Zn-Mg alloy melt using a Ti ultrasonic radiation rod. The microstructure, phase structure, mechanical properties, degradation property, and in vitro cytotoxicity were investigated systematically. The obtained Zn-3Mg-1Ti alloy is composed of the Zn, Mg2Zn11, and TiZn16. Owing to the grain refinement and second phase reinforcement, the mechanical properties of Zn-3Mg-1Ti alloy is improved. In addition, the Zn-3Mg-1Ti alloy exhibits minimal cytotoxicity compared to pure Zn and Zn-1Ti alloy. Electrochemical tests show that the Zn-3Mg-1Ti alloy has an appropriate degradation rate in Hank's solution.

**Keywords:** Zn-Mg-Ti alloy; biodegradable metals; mechanical properties; cytotoxicity
