World number 76 Sharath started the last four clash on an attacking note pocketing the first two games 11-5, 11-6 before Tianyi regained touch and reduced the difference by pipping the Indian 16-14 in a keenly contested third game.
However, Sharath held his nerves to quell the late charge and pocketed the next two games 12-10, 11-9 to round off the score and set up a summit clash with Li Ching of Hong Kong, who beat Egyptian Lashin El-Sayed 4-1 in the other semifinal.
The lanky Indian survived several anxious moments before getting the better of Salifou Abdel-Kader of France 4-3 in a long-drawn quarterfinal. All the other Indians have already crashed out of the tournament.
Earlier this month, Sharath had clinched the US Open title at Michigan.
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