The 23-year-old, who battled injury, gained confidence throughout a remarkable week in Switzerland, dropping only one set on his way to clinching the trophy.
The Indian-South African duo defeated the Dutch-Austrian pair of Robin Haase and Philipp Oswald 6-3, 6-4 in the ATP 250 final on Saturday, completing their run without losing a set.
The victory extended the Brit's run to six straight ATP Tour events with at least one win, his semifinal showing at Sydney in January still his best result of the season.
Singles, doubles and wheelchair competitions will all be played as usual after agreement was reached to stage the event following eight months of talks between Tennis Australia and state authorities