Third seed Sen, ranked 17 in the world, defeated reigning world champion Loh Kean Yew of Singapore in the final.
The Kerala shuttler missed out on a bronze medal going down to eventual champion Loh Kean Yew of Singapore in the quarterfinals of the World Championships.
Srikanth beat Lakshya Sen to become the first Indian man to enter the World Championships final.
It was Keralite Prannoy's first win over the world No. 10 shuttler in three matches.
Satwiksairaj Rankireddy and Chirag Shetty beat Chinese Taipei's Lee Jhe-Huei and Yang Po-Hsuan 27-25, 21-17 in 43 minutes.
Indian youngster Lakshya Sen lost to Denmark's Viktor Axelsen 13-21, 11-21 in the men's single semifinals.
Kidambi Srikanth's fate hung in the balance after suffering a defeat in his second group match.
Lakshya Sen fought hard before going down to top seed Kento Momota of Japan.
Lakshya will face top seed and two-time world champion Kento Momota of Japan in the second round.
Former champion Lakshya went down to Singapore's Loh Kean Yew 18-21, 12-21, while Srikanth was edged out by Malaysian Lee Zii Jia 21-19, 22-20.