Paul Lawrie shot a bogey-free closing round of 65 to win the Commercialbank Qatar Masters by four shots in Doha.
Lawrie's seven-under round was matched by Australian world number 10 Jason Day but the 43-year-old Scot rarely looked in danger of slipping up.
Day had to settle fo a share of second alongside Sweden's Peter Hanson (67), while American John Daly was also round in five-under to finish fourth on his own.
Lawrie had started the third round of the weather-truncated event just a shot clear of Nicolas Colsaerts, but the Belgian fell away badly on Sunday, a 72 seeing him finish down in a tie for ninth.
Regaining the title he last won in 1999 takes Lawrie into the world's top 50 for the first time since July 2003 - less than a year ago he was down in 272nd - and if he is still there at the end of next month he will earn his first start at Augusta for eight years.
The victory guarantees him a place in the 64-man Accenture World Match Play in Arizona later this month and the 24-man Volvo World Match Play in Spain in May.
This was the Aberdeen player's first success since his long-time coach Adam Hunter died of leukaemia in October and Lawrie was close to tears when reminded of that afterwards.
"I don't think I can play much better than that," Lawrie told Sky Sports after finishing with a 15-under par total in an event cut to 54 holes because of Friday's strong winds.
"I've been playing well for a long, long time, but it's just nice to come out one ahead and shoot seven under.
"When you've got a chance to win a tournament you don't sleep as well the night before and things go racing through your mind.
"You've got to get back to basics and I did that. I hit some nice shots coming in."
Also reminded that his 1999 victory in the tournament was followed five months later by lifting the Open Claret Jug at Carnoustie Lawrie said: "Now wouldn't that be nice to get that again?"
And as for the Ryder Cup he added: "I've been trying to keep that to the back of my mind.
"If I keep playing as I am I will get in, there's no question, but there's a long way to go and I know as well as anyone that there are a lot of good players."
