The 27-year-old German, the singles and team relay winner at the Sochi 2014 Olympics, produced the quickest opening run of 50.390 at her home track and then couldn't be caught.

She was slightly slower second time around after clocking 50.409, but her overall time of 1:40.799 was still enough to retain the title she won last year in Sigulda in Latvia.

After also winning the World Championships in Whistler, Canada, in 2013, Geisenberger now has a hat-trick of wins at the flagship International Luge Federation event.

Switzerland's Martina Kocher, who won the sprint world title yesterday, took silver today and was 0.239 behind the champion.

Bronze went to Russia's Tatiana Ivanova who improved from the fifth quickest run first time out to sneak into the top three on 1:41.055.

Germany's Tatjana Huefner had been second fastest after run one but a disappointing second effort saw her slip out of the medals and into a fourth placed finish.

Elsewhere, there was more home success in the doubles as Tobias Wendl and Tobias Arlt, the current Olympic and European champions, successfully defended their world crown to make it three victories in a row.

Yesterday's sprint champions bettered their own home track record of 49.749 by almost four tenths of a second, lowering it to 49.311 seconds in the first run. 

They then went on to secure an overall winning time of 1:38.975.

“World champion at home, that’s almost as good as our Olympic victory," said Wendl.

"I was really relaxed after the first run, and was completely calm going into the second heat."

Germany also took the silver medal as Toni Eggert and Sascha Benecken finished 0.611 adrift with the bronze going to Christian Oberstolz and Patrick Gruber of Italy who were 1.753 behind.

Austrians Peter Penz and Georg Fischler were expected to provide Wendl and Arlt their biggest challenge but a mistake on their first run saw them fail to qualify for the second, which is contested by the top 18.

The Championships conclude tomorrow with the men's singles and the team relay.