World No. 11 Sindhu prevailed over 91st-ranked, Kim 21-12 21-17 in the summit clash that lasted 45 minutes at the Tap Seac Multisport Pavilion here.
The bronze-medallist at the Glasgow Commonwealth Games, Sindhu faced tough competition from Kim, who had come into the finals after beating seventh seed Chinese Yu Sun but the experienced Indian held her nerves to stave off the challenge from the Korean.
Kim wriggled her way out of difficult situation with the help of her back hand returns but she faced resistance from the experienced Sindhu, who used her smashes to notch up winners and entered the interval 11-8 up.
Sindhu dominated the long rallies after the break and caught Kim at the forecourt twice. She also earned points with her soft taps to rush to 19-9 when Kim failed to return a net shot.