Tweddle could not match her performance of last year
Britain's Beth Tweddle conceded her title after finishing fourth on the uneven bars at the World Gymnastics Championships in Stuttgart.
Russian 14-year-old Ksenia Semenova claimed her first world title ahead of 2005 champion Anastasia Liukin of the United States.
China's Yang Yilin claimed the bronze medal with 16.150 points ahead of Tweddle on 16.125.
But Britain did win a medal when Louis Smith took bronze on the pommel horse.
It was the first world medal for a British man since Neil Thomas won silver on the floor in Brisbane in 1994.
Gold went to China's Xiao Qin with Hungary's Krisztian Berky second while Britain's other representative Daniel Keatings struggled during his routine and finished seventh
China won two of the other three event finals on Saturday, bringing their stash of gold medals to five.
Cheng Fei repeated as vault champion, edging Hong Su Jong of North Korea and Alicia Sacramone of the United States.
Chen Yibing won his second title on still rings, beating out former world champions Yuri Van Gelder of the Netherlands and Jordan Jovtchev of Bulgaria.
Brazilian Diego Hypolito regained his title on floor, with holder Marian Dragulescu of and Olympic floor champ Kyle Shewfelt both missing through injuries.