A day after try-scoring machine Tizzano re-signed with the Force and Rugby Australia until the end of 2027, Donaldson also put pen to paper on the same length deal on Friday.
Tizzano, who has scored a competition-high 12 tries this Super Rugby Pacific season, was being heavily chased by cashed-up Japanese clubs.
Flyhalf Donaldson was also being lured by overseas outfits, but the duo said there was no hesitation in re-signing with the Force and Australian rugby.
"It's one of those things when you know money's not the be all and end of the world," Tizzano said on Friday.
"There's definitely more value to stick around for a couple more years and grow the game
"There's a lot of things on the calendar. We've got the Lions, we've got the World Cup coming up.
"And to be honest, if I did sign overseas, it's kind of me not backing myself to be the openside (flanker) for the country and for the Western Force.
"I would kind of contradict myself and all my training and all my beliefs if I did do that.
"So a big thing for me was sticking around and doing what I can to get that (Wallabies) jersey."
Donaldson has shone across two seasons at the Force since moving west from NSW following the 2023 World Cup.
He won the Force's MVP Nathan Sharpe medal in 2024, and has enjoyed another strong campaign this year, including scoring an after-the-siren game-winning try against Moana Pasifika in round one.
Donaldson played nine of the Wallabies' 13 Tests last year, and has pulled on the gold jersey 16 times.
With rival playmaker Noah Lolesio taking his career offshore, Donaldson looms as a key figure in the series against the British and Irish Lions, as well as the 2027 home World Cup.
"It was an easy decision in the end and I'm really excited," Donaldson said of re-signing.
"There were one or two overseas options, but at the end of the day it's a pretty special time to be in Australia.
"World Cups don't come around very often, let alone a home World Cup.
"So to potentially be selected in that ... that was definitely a big factor of me re-signing."
Donaldson and Tizzano will be back in action on Saturday night when the Force host the Waratahs at HBF Park.
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