The German driver, so comfortable with his time that he was parked up in the garage and out of the car with a minute of the final session still to run, was joined at the front by Red Bull team mate Australian Mark Webber.
Vettel's time of one minute 25.049 seconds, was 0.405 quicker than Webber.
Formula One - Turkish GP Qualification1 Sebastian Vettel (RBR-Renault) 1:25.049
2 Mark Webber (RBR-Renault) 1:25.454
3 Nico Rosberg (Mercedes) 1:25.574
4 Lewis Hamilton (McLaren-Mercedes) 1:25.595
5 Fernando Alonso (Ferrari) 1:25.851
6 Jenson Button (McLaren-Mercedes) 1:25.982
7 Vitaly Petrov (Renault) 1:26.296
8 Michael Schumacher (Mercedes) 1:26.646
9 Nick Heidfeld ( Renault) 1:26.659
10 Felipe Massa (Ferrari)