The Indo- South African pair shocked second seeds Virginia Ruano Pascual of\nSpain and American Meghann Shaughnessy in the semi-finals of the Bausch and Lomb Championships.
They beat Australia's Nicole Pratt and Bryanne Stewart 6-2, 6-3 in the quarter-finals of the Bausch and Lomb Championships.
Zimbabwean Black and South African Huber ended the Taiwanese wildcards' title hopes with a 6-4, 6-7, 6-1 victory.
The pair would now lock horns with the third seeded pair of Beygelzimer and Fedak for the title at the centre court on Sunday.
"I am not happy with my performance, because I did a lot of mistakes," Sania said at the post-match media meet.
They beat the American pair of Angela Haynes and Neha Uberoi in the first round of the women's doubles at the US Open.\n
The duo lost to wild card entrants Ana Ivanovic and Maria Kirilenko 7-6(2), 6-2 in the first round of the Los Angeles Open.
However, the Indian ace and her partner South African Liezel Huber, entered the doubles quarter-finals of the Acura Classic.
The Indian tennis sensation climbed three rungs to finish 37th in the latest WTA Tour rankings.
The Indo-South African pair beat Spain's Lino Dominguez and Medina Garrigues to make the grade at Amelia Island.
She was beaten 32-year-old American Lisa Raymond at the Bausch and Lomb Championships in Florida.
The Indo-South African pair lost to Mashona Washington and Tathiana Garbin in the doubles quarter-finals at the WTA Tier II tournament in Paris.
She along with Liezel Huber registered a straight-set victory in the women's doubles first round in France.
The defending champions will take on Nenad Zimonjic of Serbia and Elena Bovina of Russia in the mixed doubles final.
The Indo-Swiss duo went down 3-6, 7-5, 7-10 to Cara Black and Liezel Huber at the Kremlin Cup.
The pair beat Liezel Huber of USA and Jamie Murray of UK 6-7, 7-6, 10-5 in the semi-finals.
The unseeded Australians beat Zimbabwean Kevin Ullyett and Liezel Huber of South Africa to win the mixed doubles title.
The fifth seeded pair won 7-5, 6-4 against the tenth seeded pair of Leos Fridel of Czech Republic and Liezel Huber of South Africa in the semifinals.
He and Elena Likhovtseva won their second round match against Liezel Huber and Pavel Vizner at the French Open.
Sania Mirza and Liezel Huber upset second seeds Wynn Prakusya and Angelique Widjaja to enter the semi-finals in the WTA Hyderabad Open.
Jelena Jankovic beat the Indian teenager 6-2, 7-6 (3) in the first round of the LA Open.
It was also a bad day for India's juniors at US Open on Sunday.
Sania Mirza continued her impressive run as she captured her fourth title of the season and 18th overall with Cara Black of Zimbabwe, recording a come-from-behind win over Liezel Huber and Hao Ching Chan to lift the Pan Pacific Open trophy in Tokyo.
Sania Mirza won her second title in a row as she lifted the China Open trophy with Cara Black, demolishing the challenge of Vera Dushevina and Arantxa Parra Santonja in straight sets, in Beijing on Saturday.
Indian tennis ace Sania Mirza and her Swiss partner Martina Hingis lifted their ninth title together this year beating the Spanish pair of Garbine Muguruza and Carla Suarez Navarro to clinch the WTA Finals women's doubles trophy, in Singapore, on Sunday.
Mahesh Bhupathi, Rohan Bopanna and Sania Mirza advanced to the second round of doubles events at Wimbledon on Wednesday.
India's Leander Paes and Rohan Bopanna breezed into the quarter-finals and pre-quarter-finals of the men's and mixed doubles respectively at Wimbledon on Monday, but there was bad news on the Indian challenge in the women's doubles as Sania Mirza and Liezel Huber exited in the third round.
India's Sania Mirza and Zimbabwe's Cara Black entered the final of the WTA China Open, shocking top seeds Sara Errani and Roberta Vinci of Italy 6-4, 6-4 on Friday. In doing do they extended their unbeaten run to eight matches, and Sania put herself in line for her fifth title of the season.
The ATP issued the latest men's tennis rankings on Monday and the top 10 list remains unchanged with Serbian tennis ace Novak Djokovic still leading the rankings.