Wozniacki hadn't even come close to dropping a set all week, but Dulgheru was on her game early in the match, using her heavy topspin groundstrokes to get the first break of the match and build a 3-1 lead and, after letting go of that break, breaking again en route to taking the opening set, 6-4.
But the No.1-seeded Wozniacki got right back on the horse, reeling off 11 points in a row to kick off the second set and then storming out to a 5-0 lead in the third en route to a 4-6, 6-2, 6-1 victory.
"I think she played well the whole match," Wozniacki said. "She tried to play aggressive and take the ball early. But I knew she had a tough match yesterday, so I just kept playing my game and kept trying to put pressure on her. I think I stepped it up in the second and third sets, and it paid off."
Wozniacki now has 23 WTA titles, with an impressive 23-16 record in WTA finals, and she keeps an even more impressive stat alive - she has now won at least one WTA title every year since 2008.
The Dane will now head to Indian Wells for the BNP Paribas Open, a Premier Mandatory-level event she's had a lot of success at before - she won it in 2011 (beating Marion Bartoli in the final) and reached two more finals in 2010 (falling to Jelena Jankovic) and 2013 (falling to Maria Sharapova).
"I think things have been going my way. Things are great," Wozniacki said. "I'm excited for Indian Wells. It's one of my favorite tournaments of the season, so hopefully I can play well there."
She has two Premier Mandatory titles to her name - Beijing in 2010 and Indian Wells in 2011.
The doubles title went to Liang Chen and Wang Yafan, who beat No.3 seeds Yuliya Beygelzimer and Olga Savchuk in the final, 4-6, 6-3, 10-4. Just a few days earlier a title seemed totally unlikely for the Chinese pair - they had to save six match points to win their quarterfinal match on Wednesday.
The BMW Malaysian Open was the last of eight WTA events held in the Asia-Pacific region in the early months of the season, following Brisbane, Shenzhen, Auckland, Sydney, Hobart, the Australian Open and Pattaya City. The WTA calendar now shifts mainly to North America and Europe until summer.