But many of his rivals are suffering injury or fatigue as the season approaches its climax, with Novak Djokovic, Stan Wawrinka, China Open defending champion Andy Murray and Japanese star Kei Nishikori all missing.
Nada defeated Grigor Dimitrov of Bulgaria 6-3, 4-6, 6-1 Saturday in the semifinals.
The Spaniard remains unbeaten since he became world number one in August and put in a ruthless display on his way to his 75th career title.
Kyrgios was angered by a line call in the first set and his complaints eventually cost him a penalty point at the start of the eighth game. The mercurial Australian has been in good form on hard courts in the recent past despite failing to impress in Australian and US Open.
The 36-year-old has chosen his schedule carefully this season following his struggles with injury last season and ensured that he focused his attention on the major tournaments. I'm very excited for doubles obviously.' He still plans to play in Antwerp, Basel, Paris Masters and provided he qualifies, the World Tour Finals in London as well. We're 2-2 and he's going to want some revenge from the last time we played.
"I'm very happy to be in the final again", Nadal told the ATP's official website afterwards.
Rafael Nadal will play for his sixth title of the year and Simona Halep will take over the top ranking by reaching the final in the China Open.
'This [the China Open] is a really big win for him.
"It's important for me to stay fresh physically and mentally..."
"I think the toughest part is when you come from Europe, and the first three days is not easy", he said following his defeat, asked if he feared for his health playing in the conditions.
He saved two match points in his nervy opener against Frenchman Lucas Pouille. However, the 31-year-old bounced back strongly and has been dominant en route to the final.
Pretty much no-show Kyrgios, who had been pursuing a fourth ATP singles title, displayed honest self-appraisal when he said his heavy defeat to Nadal was "typical". With his powerful and accurate serves, the Australian was able to beat Novak Djokovic, who is known for his ability to return well, twice earlier this year.