The 33-year-old is expected to make his debut for Massimiliano Allegri's men in a friendly match on Sunday against a Serie B team in Villar Perosa.
Used to imposing arenas such as the Camp Nou, Old Trafford and the Bernabeu, current Ballon d'Or holder Ronaldo will take his first steps in black and white stripes at the town's compact ground, named after notoriously brutal Italy centre-back Gaetano Scirea.
The storied Italian club hopes signing Ronaldo will help it add to the European Cups it won in 1985 and '96.
The party atmosphere in rural Piedmont threatened to get out of hand as a fan seized on the opportunity to meet Ronaldo by running on the pitch to take a picture with him during the game.
Leonardo Bonucci, who returned to Juve two weeks ago after one season at AC Milan, and Emre Can, who moved from Liverpool, both started the game, with Mario Mandzukic, Sami Khedira and Miralem Pjanic available off the bench.
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Ronaldo proved good value for the hype, scoring in the 10th minute with a neat finish after breaking a loose offside trap and closing in on goal completely unmarked.
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Juventus have signed Ronaldo not to cement their domestic dominance, after winning seven straight league titles, but to boost their global profile and bag their first Champions League triumph in over two decades.
Interest in Juve and in Italian football has spiked following Ronaldo's arrival.
Ronaldo joined the Turin club from Real Madrid earlier this summer.