Saha was at his devastating best slamming three sixes and nine boundaries for a 37-ball 71 to set the tempo, while Pankaj Shaw, Sanjib Sanyal and Arnab Nandi toyed with the Tripura attack to post a huge 196/5 after electing to bat.
Tripura were never really in the game and began disastrously to be eight for three that included inform skipper Yogesh Takawale as Ashok Dinda (2/13) struck twice in two overs.
Saha put up 79 runs with Tiwary (25) before Shaw along with Nandi and Sanyal hammered Tripura attack in two entertaining partnerships of 43 from 27 balls and 40 from 13 balls respectively to surge the total.
Shaw hit four boundaries and one six in his 24-ball unbeaten 38, Sanyal slammed three fours and two sixes en route to eight-ball 25 not out, while Nandi too contributed a valuable 26 from 16 balls (3x4, 1x6).
Bengal 196/5; 20 overs (Wriddhiman Saha 71, Pankaj Shaw 38 not out, Arnab Nandi 26, Sanjib Sanyal 25 not out, Manoj Tiwary 25) b Tripura 124/8; 20 overs (Kaushal Acharjee 41, Vijay Bhardwaj 23) by 72 runs.