The top seeds quelled the challenge of German wildcards Angelique Kerber and Andrea Petkovic 7-5 6-1 in mere 69 minutes.
Sania and Martina, the world number one team, have now stitched a 26-match winning streak together, which has brought them six titles in a row at the US Open, Guangzhou, Wuhan, Beijing, WTA Finals and now here.
It is the longest winning streak since Italians Sara Errani and Roberta Vinci's 25 in a row in 2012. Sara and Roberta had won five titles in a row, at Barcelona, Madrid, Rome, the French Open and 's-Hertogenbosch.
Sania and Martina though were not perturbed, having defused such situations many times in the last few months. They went about their business calmly and restored the parity with another break.
More From This Section
Soon it was 4-4 and the Indo-Swiss combination held the ninth game, forcing Kerber and Petkovic to serve under pressure and remain alive in the set. The unseeded team though did not crack and stayed solid to make it 5-5.
The top seeds controlled the game better in the second set, racing to a 3-0 lead by breaking their rivals in the second game.
It was a cakewalk for them from there, losing only one game before closing the match in their favour.