Bermuda's Flora Duffy won the final event of the ITU World Triathlon Series in Mexico to become world champion.
Duffy beat Olympic champion and defending world champion Gwen Jorgensen into second place both in the final event and the overall standings.
Briton Helen Jenkins came fourth in Cozumel to end the season in fifth.
Compatriot and Olympic silver medallist Jonny Brownlee, second in the men's standings, races for the title at 22:30 BST on Sunday.
GB's Non Stanford was eighth in the women's race, while team-mate Vicky Holland, a bronze medallist in Rio, did not finish after crashing on the bike leg.
Duffy, who led after the 1.5km swim, extended her lead over the main field on the 40km bike as she worked alongside GB's Lucy Hall and Jessica Learmonth, and held on in the 10km run to win in one hour 57 minutes 59 seconds.
American Jorgenson, world champion in 2014 and 2015 and beaten only twice in the past two years before Mexico, finished 1min 17secs behind, with Australia's Charlotte McShane third.