GUWAHATI: Adhiraja Hazarika (Sivasagar) and Harshita Das (Kamrup) bagged boys and girls singles TT title in the U-17 State School Olympic here today. Adhiraja defeated Hridayjyoti Sarma (Kamrup) by 3-1 in the final. Harshita won the title beating Samriddhi Barua of Kamrup also by 3-1.