Lee Westwood comfortably held off all challengers to retain the Nedbank Golf Challenge.
The Englishman, who established a seven shot lead for the final round after a course-record 62 in South Africa on Saturday, closed with a one over par 73 to win by two shots.
Sweden's Robert Karlsson finished second, with Northern Ireland's Graeme McDowell and America's Jason Dufner two shots further adrift on 11 under par at the Sun City resort.
Westwood finished with successive bogies, but it did not matter as his dominance was never seriously threatened.
Birdies on the sixth and ninth helped the 38 year old's cause, before a bogey on the 12th.
Westwood said: "I've been coming here a long time, this is the ninth time, and it's special every time I come.
"I love playing this course and yesterday was probably the best round I've ever played. It set me up to play conservatively today. It's very satisfying.
"It's all right when things go well and you are top of the rankings but when you drop to 270 you find out more about the real person.
"So to get invited back here and win back-to-back titles is a bit special.
"Yesterday was very special. I drove well and made a few putts, which you've got to do round any course when you make ten under."
McDowell made good ground to close on Westwood, before his challenge faded on the back nine as he double-bogeyed the 15th and dropped another shot on the next hole.
The 32 year old said: "Today kind of summed up the week - I made some mistakes at the wrong time.
"I might have been in the mix but maybe pushed a bit hard last night and there was the double on the 17th - but all in all I'm happy with my game."
Karlsson also made steady progress today, until his hopes of turning the screw in the closing stages faltered when he found sand on the par three 16th.
However, the Swede got the shot back when he birdied the 17th and made sure of second place when he made par on the last.
Kim Kyung-Tae finished fifth with a fourth round of 70, while home hope Charl Schwartzel was two shots further back on six under after a 72 today.
England's World Number One Luke Donald also managed a 72 to finish a further shot adrift in seventh, a shot clear of Germany's Martin Kaymer - who slipped out of contention with a final round 76.