Rebecca Adlington added the 800metres freestyle Commonwealth title to her Olympic crown as she dominated from start to finish at the Dr SP Mukherjee Aquatics Complex in Delhi.
The 21-year-old was second fastest into the final behind Wendy Trott but she was already more than two seconds ahead after 200m.
The Nova Centurion swimmer stretched that lead to to seven metres at halfway before Trott started making inroads, trying to chase down the double Olympic gold medallist.
However, Adlington was too far ahead and was never seriously threatened, touching in eight minutes 24.69 seconds ahead of Trott and Australia's Melissa Gorman.
A beaming Adlington told BBC Sport: "It's been a long season and there's been a lot going on here so I totally took away the time.
"It was just about getting out there. I am so much more comfortable when I am out in front.
"At 400 I thought there was no way that Wendy (Trott) was going to catch me so I thought I would ease back a bit and control the race."
Adlington was relieved that she had managed to cope with the pressure of being such a big pre-race favourite.
"It is the mental pressure I put on myself because I want it so badly. I have got the pressure because I have experienced the feeling of being on top and worry that I might never experience that feeling again.
"I've got to enjoy the feeling of wins like these."