The world No 1 proved too strong for the Australian, who had won nine of his previous 11 matches, winning 6-2 6-1 to secure his second Beijing title after his first victory in 2005.
But Kyrgios appeared put out by a line call that went against him in the first game and Nadal was in no mood to hand out favours as he cruised to a 6-2 6-1 victory.
The 31-year-old Nadal claimed his 75th title, just two crowns behind American John McEnroe, the fourth player with the most titles in the Open era.
The decisive moment in the first stanza came when Kyrgios, still unhappy at a bad line call from the first game on break point, started to argue with the umpire in the fifth game. And in the early stages of the match, he matched Nadal, with the pair playing some gruelling tennis in the first few games. But with the crowd behind him and Dimitrov visibly tiring, the 16-time Grand Slam champion Nadal stepped up a gear to ram home his superiority.
Into the second and Kyrgios was even more erratic, hitting a string of backhand errors as Nadal sat back to watch the show. A successful challenge followed, but Nadal won the replayed point and ultimately held. The win improved Goffin's record against Mannarino to 3-0.
After letting a couple of break points slip past, Nadal finally ripped a return victor down the line to effectively end this contest.
The volatile star had been chasing his third win over Nadal - and second in less than two months - but the unflappable Spaniard took full advantage of Kyrgios' meltdown to land his sixth title of the year. Kyrgios' main aim at this juncture was to avoid being served a bagel, as Nadal strung together his ninth game in succession to move 5-0 in front. Despite the loss, Kyrgios moved to 15th spot in the Emirates ATP Race To London, staying in the hunt for a spot at the Nitto ATP Finals.