SANTA CLARA, Calif. (AP) — The San Francisco 49ers and Tennessee Titans didn’t take long to get on each other’s…SANTA CLARA, Calif. (AP) — The San Francisco 49ers and Tennessee Titans didn’t take long to get on each other’s nerves at a joint practice. “The energy was hot from the first play,” Titans rookie receiver Carnell Tate said. “It’s part of a joint practice,” said Tennessee linebacker Cedric Gray, who noticed one big pileup on the other field. Saleh enjoyed being back in the Bay Area after spending last season in his second stint as defensive coordinator for San Francisco. Titans plan to play starters, while Niners will use mostly backupsSaleh said the Titans will give most of their starters some playing time Thursday night while the 49ers will use mostly reserves.