The world number one calmly rolled in a six-footer on the 13th green to beat South Korea's Yang Yong-Eun 6&5 as the Americans triumphed for a sixth time in eight editions of the biennial team competition.
Leading the Internationals by 12.5 points to 9.5 going into the final day at a chilly and overcast Harding Park, the hosts needed only five points from the 12 on offer.
They built early momentum and ended up winning six matches and halving two to secure victory by 19.5 points to 14.5. Stewart Cink, Hunter Mahan, Anthony Kim and Sean O'Hair put the first points on the board to leave the US on the brink before Woods took centre stage.
The 14-time major champion ended his week with a flawless 5-0 record, matching the achievements of Mark O'Meara (1996) and Shigeki Maruyama (1998), but was unaware his success against Yang had secured the trophy for his team.
"All I knew was I was trying to get my point and I was five up trying to make it six," Woods told reporters after recording five birdies in 13 holes. "I didn't look at any boards. I saw we were down six matches at one point so I just kept my head down and tried to extend my own lead.
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