Czech Barbora Spotakova added a second world javelin gold to her trophy cabinet in London on Tuesday.
Spotakova, the 36-year-old two-time Olympic champion who also has a world gold (2007) and two previous world silvers to her name, threw a best of 66.76 metres.
Lingwei Li of China claimed silver with 66.25m, team-mate Huihui Lyu taking bronze (65.26).