The ruthless world number two proved one step too far for unseeded Croat Mirjana Lucic-Baroni, whose fairytale tournament was finally ended in a crushing 6-2, 6-1 defeat in just 50 minutes.
Konta calls Serena thrashing ‘best experience’
In swatting aside the 34-year-old, in their first meeting since 1998, Serena, 35, stayed on track for a seventh Australian title which would take her past Steffi Graf's Open-era record of 22 major wins.
She has refused to talk about the possibility of finally surpassing the German, but now has a golden chance of further cementing her place in history.
Winning the title would also mean the world number one ranking would be hers again, after Angelique Kerber snatched deposed her late last year.
Nadal, Serena cruise into quarter-finals
Only Venus stands in the way after the elder Williams rolled back the years to beat fellow American Coco Vandeweghe 6-7 (3/7), 6-2, 6-3 in the other semi-final.
It ensured another chapter in their eventful family history as they meet for their ninth Grand Slam final on Saturday, eight years after the last. Serena holds a 6-2 advantage.
"I didn't watch [Venus]. Obviously I was really proud, she's an inspiration, my big sister," said Serena. "She's my world, my life, she means everything to me. I couldn't be happier for us both to be in the final. It's the biggest dream come true for us."
Serena Williams gets engaged to Reddit co-founder Ohanian
She also paid tribute to Lucic-Baroni, a former teenage prodigy when the Williams sisters were emerging in the 1990s before her career was derailed by personal problems. "Mirjana is an inspiration, she deserves all the credit today. To get this far, after everything she has gone through, that just inspires me."
COMMENTS
Comments are moderated and generally will be posted if they are on-topic and not abusive.
For more information, please see our Comments FAQ