Three-time All-Star Marc Gasol became only the second man to win an NBA crown and the World Cup in the same year after Spain brushed aside Argentina 95-75 on Sunday.
Spain, who survived double overtime against Australia to reach the final, led throughout in Beijing to win international basketball's biggest prize a second time.
The only previous occasion was in 2006 with the two Gasol brothers, Marc and older sibling Pau, on the team. Pau did not feature in China because of injury.
The latest triumph was particularly sweet for the 34-year-old centre Gasol, who three months ago also played a key part in the Toronto Raptors' run to the NBA title.
Gasol, who had 14 points, seven rebounds and seven assists, joins Lamar Odom, a double winner in 2010 with the United States and Los Angeles Lakers.
Surprise finalists Argentina had not triumphed since they hosted the inaugural World Cup in 1950.
As a contest, the final was over by the fourth quarter – although the Albiceleste did rally belatedly to reduce Spain's previously mighty lead.
Fans of both teams had made it feel more like a football match, decked out in their national colours, chanting loudly and refusing to sit down.
Spain, for whom Ricky Rubio of the Phoenix Suns has been one of the leading players of the tournament in China, surged into a 14-2 lead.
In front of a capacity crowd, Argentina's 39-year-old talisman Luis Scola could not escape the attentions of Pierre Oriola.
Led by their slick-haired Italian coach Sergio Scariolo, Spain were up 21-14 going into the second quarter and increased their advantage to 43-31 at half-time.
With Rubio prominent, drilling 20 points, Spain never looked like surrendering their lead, repeatedly thwarting Argentina's suffocated offence.
Australia wait goes on
France roared back after half-time to defeat Australia 67-59 and claim a second World Cup bronze in a row – and extend the Boomers' long wait for a major medal.
Turkish-based guard Nando De Colo led all scorers with 19 points for France and Nicolas Batum had nine points, six assists, three rebounds and three steals.
The French, one of the tallest teams at the tournament, defeated reigning two-time holders the United States in the quarter-finals, but then lost heavily to Argentina.
"For us it's something very, very special and important we did it after a very difficult first half," French coach Vincent Collet said.
"Many teams could have given up, even easy shots we were missing in the first half.
"We started to move the ball better in the second half and that's why we won this game."
It was hard on Australia, who similarly led for long periods in their semi-final against Spain.
It is still the best finish for the Boomers, who had never gone beyond the quarter-finals at 11 previous World Cups, but they are yet to claim a medal at the worlds or Olympics.
Deposed champions the United States, who were missing their elite names, finished seventh, their lowest position in tournament history.
They did, at least, qualify to defend their Olympic title in Tokyo next summer.
With 32 teams, this was the biggest Basketball World Cup ever.
The next one will be in 2023 in Japan, Indonesia and the Philippines.
Argentina: This is the third FIBA World Cup medal for Argentina, making it the fifth nation with that many after the United States (12), Yugoslavia (10), the Soviet Union (eight) and Brazil (six). Another four nations have two medals, including Spain. ... Argentina fell to 2-8 all-time against Spain in World Cup or Olympic competition.
Spain: It was the fourth consecutive FIBA title game to be decided by double digits. ... It was also a double-title year for Spain coach Sergio Scariolo; he's an assistant on Nick Nurse's staff in Toronto. ... Everything went Spain's way early — even air balls. Rudy Fernandez took a corner 3 that sailed long by about two feet, landing in the hands of Juan Hernangómez . He laid in the miss to start a three-point play, part of Spain's 14-2 game-opening run.
Joining Rubio on the all-tournament team were Gasol, Scola, France's Evan Fournier and Serbia's Bogdan Bogdanovic.
Among the big names in attendance on the final day of the World Cup: Chinese basketball legend Yao Ming, NBA Commissioner Adam Silver and Deputy Commissioner Mark Tatum, International Olympic Committee President Thomas Bach, FIBA ambassador and five-time NBA champion Kobe Bryant, and Tony Parker and Manu Ginobili — both four-time NBA champions with San Antonio.
5 WITH 2
Spain is the fifth nation to win the World Cup (or its predecessor, the world championship) at least twice. The U.S. and Yugoslavia are five-time champions, the Soviet Union won three titles and Brazil has won two.
Argentina: Qualified for 2020 Tokyo Olympics.
Spain: Qualified for 2020 Tokyo Olympics.