Andy Murray, who won the singles at this tournament a year ago but crashed out in the second round this year, found consolation at the end of a disappointing week when he combined with older brother Jamie to win 7-6 (8/6), 5-7, 10-7.
The title is the first the pair have won together on the ATP Tour, having previously reached finals in Bangkok and Valencia.
David Ferrer beat Marcel Granollers 7-5, 6-3 in an all-Spanish singles final to virtually clinch his place at the season-ending ATP World Tour Finals.
Ferrer used key breaks in each set and defended his own service game well at the City of Arts and Sciences. Granollers netted Ferrer's serve to decide the contest in the first all-Spanish final on an indoor surface since 2000.
Ferrer's second win of the season - and ninth of his career - moved him ahead of Andy Roddick into seventh place in the points standings to virtually secure his place in the season-ending tournament in London later this month. The top eight qualify with only the Paris Masters left to play.
"This is one of the happiest days of my career, if not the most," an emotional Ferrer said after climbing into the stands to celebrate a victory at his home event with his parents.
"I'm so happy," he added, "There are no words to describe it."
Ferrer clinched the first set when he slapped a backhand shot that managed to touch the far corner as Granollers hesitated to be broken for the second time, and Ferrer maintained the momentum in the second set.
"You deserve this," Granollers said to Ferrer during the prize ceremony. "You're a great player and you've fought a lot to achieve what you have."
Meanwhile, Roger Federer won the Swiss Indoors title in his hometown for the fourth time in five years yesterday when he beat Novak Djokovic 6-4, 3-6, 6-1 in the final.
The Swiss also recorded his 65th ATP tournament win to move ahead of Pete Sampras, though he still trails Jimmy Connors, Ivan Lendl and John McEnroe in overall career titles.