 This research has demonstrated that Tn-nitriding layers can significantly improve the corrosion resistance of T6-Al4V titanium alloys in the human environment. The Tn-nitriding layer consists of tin, T2N, and alpha-TN phases, which provide excellent protection against corrosion. Furthermore, the Tn-nitriding layer can be easily fabricated using HCPSN, making it suitable for mass production. This article was authored by Lei Zhang, Minghao Shao, Xiaoxiao Zhang, and others.