Giorgi, belying her ranking of world number 100, had defeated US Open champion Sloane Stephens in the first round, ousted twice Wimbledon and former Sydney champion Petra Kvitova and raced past Agnieszka Radwanska 6-1 6-2 in the last eight.
Kerber, who began previous year at top of the rankings before finishing at No.22, won her seventh straight match of 2018 after winning four singles matches at the Hopman Cup last week.
"I felt great yesterday; I felt like I played my best tennis probably all year. I mean, I'd love to go one further and hold the trophy up here, but, you know, I love playing in Australia, I love playing at home, it's nice to be able to get a lot of matches here and be rewarded with the final".
She slammed her racquet into the ground before being told off by the umpire, and just minutes later Barty had claimed the second set and levelled the match.
She will face Ashleigh Barty, who beat Australian compatriot Daria Gavrilova 3-6, 6-4, 6-2 in the other semifinal.
It will be the 19th-ranked Barty's second career title and her win over the 25th-ranked Gavrilova came after a topsy-turvy match that included 11 breaks of serve.
Kerber started 2017 ranked world number one but by the end of the season had slumped to 21, and she headed into the Sydney event ranked 22.
QVC Group (NASDAQ: QVCA) - Do the Stock Experienced Heavy Trading?
Ahl Ptnrs Limited Liability Partnership invested in 0.03% or 9,573 shares. (NYSE:PBF) on Thursday, June 1 with "Hold" rating. The company was maintained on Tuesday, July 18 by Pivotal Research. (NASDAQ: NFLX ) on Thursday, January 4. (NASDAQ: NFLX ).
"It's nice to make a final at home, but I think in my eyes it's flawless preparation for next week", Barty said.
The Queenslander's summer began with a first-round defeat in Brisbane last week but she has bounced back well ahead of the Australian Open, where she opens against world No.69 Aryna Sabalenka.
"We have set up a flawless platform for me to work with this year to try and go deep in tournaments, whether it's in Australia or in Europe or in the States".
"She's (Giorgi) beaten a lot of good players this week and so I was just trying to get a lot of balls back".
"I'm very happy, first of all, because life on ATP Tour is not easy. Still, I'm just trying to focus on every match, trying to learn from every single match", Kerber said.
Italian fourth seed Fabio Fognini set up a semi-final against qualifier Daniil Medvedev following a 7-6 (7-4), 6-7 (7-4), 6-2 marathon against Frenchman Adrian Mannarino.
- Man Who Shot Knoxville Officer Added to TBI's Ten Most Wanted List
- Biggest drop in housing prices in a decade
- Starz To Adapt 'John Wick' Franchise For Original TV Series
- Chandigarh Stalking Case: Haryana BJP chief's son Vikas Barala gets bail
- Kansas Gov. Sam Brownback delivers State of the State address
- Activision Blizzard (ATVI) Sets New 12-Month High on Analyst Upgrade
- State's Response to Legionnaires' Outbreak 'Quick,' 'Decisive'
- Camila Cabello's Debut Album 'Camila' Breaks Major iTunes Record in 24 Hours
- Toyota presents the GR Super Sport concept at Tokyo Auto Salon 2018
- Versace Family Slams Second Season of American Crime Story