World number one McEwan was the pre-tournament favourite and dominated American team mate Shannon O'Keefe at South Point Bowling Plaza.

McEwan started the match with a five-bagger and never looked back as she sealed the world title with a 259-193 victory.

"Our goal was to be bowling each other because that is a guarantee one of us gets the gold medal," said McEwan. 

"It was very comfortable being in the match together, and very emotional on the stand. 

"Shannon has been my hero on Team USA, so having her hold my hand during the anthem was very emotional."

O'Keefe reached the final with a last four 213-183 win against Sweden's Sandra Andersson, with McEwan ousting South Korean Lee Na-young 256-173.

Lee and Andersson both received bronze medals.

Sweden 1 edged a gripping doubles final against South Korea 1, securing a first World Championship title since 2007.

Josefin Hermansson and Jenny Wegner sealed the gold with a final-frame triumph to defeat Son Hye-Rin and Lee Yeonji 436-431.

Bronze medals were awarded to losing semi-finalists Juliana Franco and Clara Guerrero of Colombia 2 and compatriots Rocio Restrepo and Maria Rodriguez of Colombia 3.

In the trios final, the US team of Liz Kuhlkin, Missy Parkin and Jordan Richard claimed gold with a 655-632 victory against Colombians France, Guerrero and Rodriguez.

Mexicans Adriana Perez, Paola Limon, and Sandra Gongora, and Kim Moon-Jeong, Baek Seung-Ja and Jung Da-wun of South Korea earned bronze medals as losing semi-finalists.

The tournament concludes tomorrow with the five-player team and masters semi-finals and finals.