Goddess Savitri is a manifestation of Goddess Saraswati, the Hindu goddess of learning and arts. As Savitri, She is the consort of Hindu God Brahma. A story in the Puranas suggests why Goddess Saraswati appeared as Goddess Savitri. Brahma once wanted to conduct a yajna. But he had no wife – as per Vedic rule a man without a wife could not conduct a yajna. So Brahma requested Goddess Saraswati to be his spouse and sit by the side of him in the yajna.
Saraswati agreed to be the consort of Brahma and said that she will appear in the form of Savitri to be the consort.
Thus Saraswati appeared as Goddess Savitri to be the divine consort of Brahma.
There is another story associated with Goddess Savitri and Brahma. The story shows the close link between Savitri and Goddess Gayatri. It states that after agreeing to be the consort of Brahma, Savitri left to purify herself.
Hours passed but Savitri did not appear for the yajna. So Brahma looked around and saw a milkmaid. She passed her through the body of a cow and transformed her into Goddess Gayatri.
Brahma began the yajna with Gayatri by his side. Soon Goddess Savitri returned and was furious to find another woman partaking in the yajna. She became a river and washed away the yajna altar.
Later when she calmed down, Savitri became one with Gayatri and conducted the yajna.