The Olympic team bronze medalists reached the final after a three-game sweep over Chinese Taipei.
They were up against South Korea’s Jeon Ji-hee and Shin Yubin in the gold medal match.
With the contest tied at a game each, the Koreans pulled away in the third game by scoring seven straight points.
Jeon and Shin went on to win 11-5, 7-11, 11-3, 11-4.
Hong Kong picked up a total of one silver and three bronzes at this year’s Asian Championships – their best result since 2007.