Chouhan totalled 19-under 261 on a bright and sunny day at the Lidder Valley Golf Course here. Khalin Joshi of Bangalore finished runner-up at 17-under 263.
Chouhan (65-64-65-67), the overnight leader by two strokes, consolidated on his lead with two birdies on the first three holes courtesy an excellent drive on the first and a chip-in on the third.
He came up with another immaculate approach on the eighth to set up a birdie and emerge as the firm favourite. The 27-year-old from Madhya Pradesh then had a couple of hiccups as he dropped shots after lip-outs on the 11th and 14th.
"I'm delighted to win my first title in almost two years. After an excellent 2012 season, I had a relatively poor run in 2013. I had had two top-10s this year and knew that I was getting close to a win. The loss in a playoff earlier this year was a big disappointment. The win has rejuvenated me and helped me set new goals for myself," said Chouhan, who has now climbed to fourth position on the PGTI's Rolex Rankings.
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Khalin (65-66-67-65) runner-up finish was his best result of the year. The 21-year-old made seven birdies and two bogeys in his final round of 65, to move up four places from his overnight tied sixth position.
Gurgaon-based professionals Shubhankar Sharma and Arshdeep Tiwana shared third place at 16-under-264.
Jyoti Randhawa was a further shot back in tied fifth along with Delhi's Shamim Khan, Shankar Das of Kolkata and Kapurthala lad Ashbeer Saini.
Reigning Rolex Rankings champion Rashid Khan of Delhi secured ninth place at 14-under-266.