Martin Kaymer won the 2010 PGA Championship but lasted in the top spot only eight weeks.
Kaymer only had one bogey all week and finished a tournament record 24 under.
"To play in your own country with all of the support is awesome, " Kaymer added.
Kaymer is on 18 under par as he targets a third Abu Dhabi title in four years.
Westwood has been paired with Martin Kaymer against Phil Mickelson and Dustin Johnson in the first fourball.
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Kaymer increased his five-stroke overnight lead into an eight-shot advantage after only five holes of the final round.
Only Kaymer has won a major title with the 2010 PGA Championship crown.
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Mickelson, Woods and USPGA champion Martin Kaymer all have a chance to take Westwood's number one spot this week.
"I'm a little tired of it, " 2010 PGA championship winner Kaymer told CNN.
Westwood is well placed to retain his ranking, with rivals Martin Kaymer and Phil Mickelson five shots behind him.
Kaymer finished seventh in the Open at St Andrews earlier this year when he closed with three successive bogeys.
Ryder Cup hopeful Kaymer had nine birdies on his card as he finished with a 13-under total of 131.
Former world No. 1 Martin Kaymer, who uses a traditional putter, also wants to see the issue put to bed.
The US Open winner needs a top-three finish to have any chance of passing Race to Dubai leader Martin Kaymer.
The leading match of Westwood and Kaymer against Johnson and Mickelson was on the sixth fairway when play was halted.
Padraig Harrington, lying second when he was disqualified over a ball-marking incident on Thursday, was impressed by Kaymer's stunning display.
Graeme McDowell (69) is 10 shots back and conceded defeat to Martin Kaymer in the battle to be Europe's number one.
Westwood and Kaymer began Europe's challenge and finished the day one up, although they had been three up before the rain-break.
But the title is now Kaymer's to lose after last season's European Tour leading money-winner maintained his outstanding form in Abu Dhabi.
Lee Westwood, Martin Kaymer and Luke Donald took turns before this week.
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Italian brothers Edoardo and Francesco Molinari formed another pair, while world number four Lee Westwood teamed up with USPGA champion Martin Kaymer.
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Although he improved on the final two days, hitting a 69 on the Saturday, he could not deny Kaymer his maiden title.
Wild card pick Nicolas Colsaerts of Belgium shot 65 to reach five under, while Germany's Martin Kaymer is a shot further back.
Non-Ameicans Lee Westwood, Martin Kaymer, Luke Donald and Rory McIlroy have all taken turns at the top of the World Golf Rankings.
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Defending champion Rock finished on 76, while Ernie Els, playing alongside Rock and Rose, had a 71, the same as Martin Kaymer.
Kaymer is fourth in the rankings after winning the Dunhill Links Championship.
McIlroy said he quickly gave up thoughts of challenging Kaymer and played most of the round trying to stave off those chasing behind.
Kaymer endured a frustrating 2012 after to make changes to his swing, an alteration which left his struggling for most of the year.
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