Kane Williamson greets Aaron Finch after Finch won the toss in Dubai on Sunday. AP
Australia thrashed New Zealand by eight wickets in Dubai after Mitchell Marsh hit an unbeaten 77 to steer the team home to their target of 173 in 18.5 overs.
The flip of the coin weighed heavily in the tournament with teams chasing having a clear advantage due to the night-time dew in the UAE.
Teams bowling first won 12 of 13 matches played at the Dubai International Stadium.
"It did play a big factor to be honest," Finch said on being how he ensured the call of the coin fell in his favour.
"I tried to play it down as much as I could because I thought at some point in the tournament I'm going to lose a toss and we'll have to bat first. "But it did play a big part. You saw at the end there, the dew factor, the slow balls weren't holding in the wicket as much. I don't know how I did it (win the tosses). Maybe it was just fate."
Kane Williamson (L) looks at the pitch as Aaron Finch talks to the commentator in Dubai on Sunday. AP
Finch got out early for five but Marsh and David Warner, who hit 53, put on 92 for the second wicket then set up the chase to perfection.
Australia came into the semi-final with four wins and a loss to England in the Super 12 stage - the only game where Finch lost the toss. The Aussies were bowled out for 125 after being invited to bat first by Eoin Morgan's team who overhauled the target in 11.4 overs.
But the result was just a blip in Australia's otherwise strong campaign that finished with two clinical chases including beating Pakistan in the semi-final with one over to spare.
Australian players celebrate after winning the T20 World Cup final. AFP
However New Zealand skipper Kane Williamson did not make much of the issue and admitted to having been outplayed by a champion side.
"I mean, it did have an effect. Some dew did come in. But take nothing away from the quality of Australia," Williamson told reporters. "They came out in the final and played superbly well. You know, credit goes to them and the way they played their cricket for the last three weeks."
Australia coach Justin Langer had earlier talked about the team's readiness to face any situation and revealed that Finch wanted to bat first against Pakistan but was "talked out" of it.
Australia finally ended their jinx by winning the elusive T20 World Cup title in the seventh attempt. This was the only silverware, which was missing from their trophy-laden cabinet. Before this, they had come closest to lifting the crown in 2010, only to be denied by England in the final.
Though Babar scored a half-century and Pakistan won the low-scoring warm-up game against the West Indies on Monday, the captain consumed 41 deliveries for his 50, while Rizwan struck his 13 off 17 balls and didn't score a single boundary.
Namibia reached the Twenty20 World Cup second round for the first time on Friday when they defeated Ireland by eight wickets.World number 19 Namibia, the lowest-ranked team in the tournament, chased down their modest target of 126 with skipper Gerhard Erasmus making an unbeaten 53.
Team Manager Joxean Matxin Fernandez (Spa) will lead the squad alongside Sports Directors Andrej Hauptman (Slo), Simone Pedrazzini (Swi) and Marco Marcato (Ita).
Indian women will play a three ODI series in the captaincy of the Harmanpreet Kaur against Sri Lanka’s 19-member squad, which is being led by Chamari Athapaththu.
A dominant England has swept New Zealand 3-0 in the Test series with an aggressive seven-wicket victory in the third and final Test match on Monday.