BERLIN (AFP) - Defending champion Olga Kaniskina of Russia won the women's 20 kilometres walk world title here on Sunday. The 24-year-old timed 1hour 28minute 9seconds to beat home Ireland's Olive Loughnane while China's Hong Liu took the bronze to make up for her upset at being fourth in last year's Olympics in front of her home country supporters. Kaniskina's victory gave Russia their second gold on successive days in the walks while Liu's bronze was also the second successive third placing for them as they had also taken bronze in the men's race. In steaming hot conditions the competitors had set a steady initial pace. So much so that after 20 minutes there was a tightly bunched group of around 20 walkers with Spain's 2007 world bronze medalist Maria Vasco, Germany's Sabine Krantz and Norway's Kjersti Tysse Platzer - whose brother had been prominent in the men's race for a long time on Saturday - three abreast in the lead. Australia's lead hope for a medal Cheryl Webb suffered an early blow when the 32-year-old Commonwealth Games bronze medalist got a first warning - she was later to be disqualfied after receiving three. Up front Kaniskina upped the pace all of a sudden and only two other rivals - Tysse Platzer and fellow Russian Anisya Kirdyapkina could go with her leaving a group of around 10 struggling to breach the gap. Kaniskina's remorseless pace was too much for her companions and turning round the Brandenburg Gate with under half the race to go they were left trailing. She quickly opened up an imposing 13-second lead, while Tysse Platzer looked to be leaving Kirdyapkina in her wake. However, while Kaniskina simply got stronger, the other two wilted - both receiving two warnings leaving them on the edge of being disqualified - and they were replaced as the principal if vain pursuers of the Russian by Loughnane and Liu. Passing the 15km mark Kaniskina held a 56sec lead over Loughnane - eighth in last year's Olympics - and Liu while that duo were a comfortable 11sec clear of Kirdyapkina. At the same mark came the end of Tysse Platzer, on a high at one point and dreaming of a medal, as she was also disqualified, and distraught went to the barriers to look for her brother and got a consoling hug. Both Liu and Loughnane got a warning early on the second lap, though, the Irish girl still had the legs to pull away from her Chinese rival - but there was no catching the impressive Russian.