Divij and Raja dropped the first set but came back strong for a 5-7 7-6(3) 10-4 win in one hour and 24 minutes in the final against the second-seeded Thai-Kiwi combine.
The Indians split USD 2480 and earned 80 ranking points each for their win.
Left-handed Divij was playing his second final of the season, having ended runner-up at Kolkata Challenger with Vishnu Vardhan.