V. Thiripurasundari, S. Suganya, Decomposition of S*α-Continuity, BMSA Volume 15, Bulletin of Mathematical Sciences and Applications (Volume 15) https://www.scipress.com/BMSA.15.43 Abstract: The main purpose of this paper is to introduce the concepts of S*α<sub>t </sub>-sets, S*α<sub>t </sub>-Continuity and obtain decomposition of Semi *α-Continuity in topological spaces. Keywords: Semi α-Open, Semi α<sub>t</sub>-Continuity, Semi α<sub>t</sub>-Set