In addition to a win over the promising Ryan Bader, Jones became UFC light heavyweight champion with a win over Mauricio Rua and defended his belt against former champs Quinton Jackson and Machida.
Also at UFC 140, Frank Mir took another step toward reclaiming his title of UFC heavyweight champion by becoming the first fighter to ever submit Antonio Rodrigo Nogueira. Mir's kimura left the Brazilian heavyweight with a broken arm—an injury that hopefully won't lead to the end of the former Pride champion's career.
With UFC 140 in the past, now is a good time to take a look back at the best images from the fight week that was.
Known as "The Huntington Beach Bad Boy," Tito Ortiz continued to label himself "The People's Champion" in the lead-up to UFC 140.
The attitude change seems to have gained Ortiz new appreciation from the fans, as they chanted his name during his bout with Antonio Rogerio Nogueira on Saturday night.
Frank Mir shows off his ground game during UFC 140 open workouts. Although Mir is considered one of the best heavyweight jiu-jitsu practitioners in the world, few believed he had a chance to become the first to submit Antonio Rodrigo Nogueira.
After an absence from the UFC to attend art school, beloved ring girl Brittney Palmer returned to cageside for UFC 140. On Saturday, news also broke that Palmer would be posing for Playboy in 2012.
After UFC president Dana White spoke out against Dennis Hallman's decision to wear compression briefs in his previous Octagon appearance, "Superman" really tested the UFC brass' temper by missing weight for his UFC 140 fight with John Makdessi.
With his job on the line, Hallman delivered inside the Octagon, though. A submission victory over John Makdessi at UFC 140 ensured Hallman extended his life as a UFC fighter.
Lyoto Machida unveiled a more muscled physique than fans have become used to at the UFC 140 weigh-ins. However, the added muscle wouldn't prove to be enough to dethrone Jon Jones in Toronto.
Prior to his bout with Quinton Jackson, Jon Jones would never look directly at his opponent during pre-fight staredowns. However, Jackson appeared to get under Jones' skin enough to change that habit, because the champion opted for a proper stare down with Lyoto Machida at the UFC 140 weigh-ins.
Mark Munoz speaks to fans at a question-and-answer session that preceded the UFC 140 weigh-ins in Toronto, Canada.
Munoz will be taking on Chael Sonnen at UFC on Fox 2 in a bout that will likely determine the next middleweight contender to Anderson Silva's title.
Just before the UFC 140 fighters hit the scales for the weigh-ins, UFC lightweight champion Frankie Edgar and future opponent Benson Henderson played as themselves in UFC Undisputed 3, a video game scheduled to hit stores in February.
A back-and-forth first round ended with Edgar knocking out Henderson via head kick.
Toronto fans welcome the UFC back to Canada. Earlier in 2011, the UFC sold more than 55,000 tickets to fill Toronto's Rogers Centre.
Rich Attonito's Saturday night got off to a good start, as he took UFC newcomer Jake Hecht down in the first round and likely won the opening frame on the scorecards. However, when Attonito looks to take Hecht to the canvas in the second round, he was rocked by an elbow and couldn't recover.
In the opening fight of the preliminary bouts that aired on ION, Yves Jabouin and Walel Watson battled it out for three closely contested rounds.
While Watson ended up on the losing end of a narrow decision, there were no losers in this highly entertaining bout.
Though his opponent had proven to have a granite chin in the past, Constantinos Philippou was able to put Jared Hamman away in the first round of their bout at UFC 140.
Krzysztof Soszynski was looking to stretch a winning streak to three fights at UFC 140. However, "The Polish Experiment" was quickly knocked unconscious by Croation Igor Pokrajac inside the first minute of the fight.
Taking on Canadian Mark Hominick, "The Korean Zombie," Chan Sung Jung, silenced the Toronto crowd by tying the record for fastest knockout in UFC history at UFC 140.
Only seven seconds passed between the opening bell and the time referee Herb Dean called a stop to the bout.
Canadian fan favorite Mark Hominick was a heavy favorite heading into his bout with Chan Sung Jung at UFC 140. However, Hominick came out too aggressive with a wild left hook. After being rocked by a counter, Hominick was unable to recover.
Although he got off to a strong start at UFC 140, Tito Ortiz took one step closer to retirement on Saturday night. A knee to the ribs crumpled Ortiz, who couldn't recover and was visibly in pain after his loss to Antonio Rogerio Nogueira.
Frank Mir looked to be a punch or two from being knocked unconscious in the first round of his bout with Antonio Rodrigo Nogueira at UFC 140. However, a wild scramble ended with Mir cranking on a kimura that rendered Nogueira's arm broken.
Antonio Rodrigo Nogueira had never been submitted before Saturday night, so it came as no surprise to anyone when the jiu-jitsu black belt refused to tap. Hopefully, Nogueira's stubbornness and broken arm won't lead to the legend's retirement.
Prior to UFC 140, Jon Jones had disposed of every opponent he has ever faced with relative ease. While he remained undefeated and retained his belt, Jones finally looked human against Lyoto Machida.
Machida's unique style frustrated the champion in the first round, but Jones adjusted and submitted the challenger in the second round.
Even after facing adversity for the first time in his career, Jon Jones was able to modify his game plan, which led to a submission victory and his second straight title defense, something no light heavyweight has done since Chuck Liddell reigned as champ.
Sean Smith is a Featured Columnist for Bleacher Report MMA. For the latest insight and updates on everything MMA, you can follow Sean on Twitter @SeanSmithMMA.