She has won Wimbledon seven times, including the last two times she played the event in 2015 and 2016.
The old adage of feel your way in to a match and start solidly does not appear to apply to Ostapenko who put together a insane sequence to start her first Wimbledon semi-final.
The 13th seed had never taken a set off Williams in three previous meetings and any hopes she might have harboured of setting up an all-German final with Angelique Kerber, who had beaten Jelena Ostapenko earlier, were dashed in 70 unforgiving minutes.
"I didn't expect to play this well so quickly into my comeback", Williams said after the match. "These are the matches I was working for as a kid and to be in the final at Wimbledon is great". She then played the Miami Masters and lost in the first round before withdrawing from the French Open before a fourth-round match against Maria Sharapova with a pecotral muscle injury.
And the first Latvian woman to make the Wimbledon semi-finals was paying the price for more rash mistakes as the match slipped away.
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"I am really happy and proud to be back in the grand slam final".
Kerber looked anxious and Ostapenko had a point to close to within a game but she dumped a backhand return into net and then coughed up two more errors to hand Kerber victory.
Williams will equal Margaret Court's all-time record of 24 Slam titles if she stages a repeat of the 2016 final, when she defeated Kerber.
She is on a 19-match winning streak at the All England Club, with her last defeat coming against France's Alize Cornet in the 2014 third round.
Goerges is the only one of the four semi-finalists still waiting to win her first Grand Slam title. Ostapenko's strokes were missing and she grew increasingly frustrated, slapping a thigh after a miss or leaning forward and putting her hands on her knees after others.
The final tally told the story: Ostapenko had far more winners, 30-10, but also far more unforced errors, 36-7.