This was the 18-year-old rookie, Vani's third title of the season and she has now emerged as a strong contender for the Order of Merit title on the Hero-WGAI Tour.
After Smriti, Vani becomes the second player to clinch three titles this season. The only others to win this year have been Sharmila in the first leg and Nalini Singh Siwach.
Vani carded the only under-par round of the day at 70 to total 219, while Smriti Mehra (73), the overnight joint leader with Nalini Singh Siwach, finished second at 220.
Nalini, who was in contention for the title till the turn, collapsed as she bogeyed five times on the back nine to card 77 and finish fourth, one behind Neha Tripathi (74).
Neha totalled 223, while Nalini 224.
Saaniya Sharma (80) also had a rough day and was fifth at 228. Shraddhanjali Singh (74) was sixth at 231.
Vani, starting the day in the second last group and two shots behind Smriti and Nalini, birdied the third and sixth, but bogeys on fourth and seventh meant she was even par for front nine. (MORE)