Pujara blasted seven fours and a six during his 57-ball innings to anchor Saurashtra to 144 for six in stipulated 20 overs. They then returned to dismiss Tripura for 78 with 15 balls to spare.
D S Punia (3/19) was the pick of the bowlers, while Jaydev Unadkat (2/21), Shaurya Sanandia (2/14) and K R Makvana (2/8) scalped two wickets each for Saurashtra.
Chasing 145 to win, Tripura suffered a complete colappse as only two batsmen -- Udiyan Bose (12) and Nirupam Sen (12) -- could reach double figures.
Saurashtra: 144 for 6 in 20 overs (C Pujara 67; S Majumder 2/22)
Tripura: 78 all out in 17.3 overs (NN Sen 12; DS Punia 3/19).