"a transformation into" is correct and usable in written English.
You can use it to refer to a change or alteration from one state to another, such as "The caterpillar underwent a transformation into a butterfly."
Fresh Kills closed as a landfill handling the city's residential garbage more than a decade ago and is now undergoing a transformation into a 2,200-acre 2,200-acre
The apps are part of what Facebook executives say is a transformation into a "mobile first" company.
In the 1970's it began a transformation into a medical center for the seven-county region north of New York City and south of Albany.
And while one still brandishes the familiar, Angus Steakhouse-like, blood-clot colour scheme, the other has undergone a transformation into something altogether more… Jamie.
But they were ultimately overturned in 2004, and Mr. Anwar emerged from prison having undergone a transformation into the leader of Malaysia's opposition.
Over the course of the film another character, a geeky television news camera operator named Hal (Jonah Hill), undergoes a transformation into a superhero named Tighten.
Bale plays Moses with a luxuriant beard, while Joel Edgerton makes a remarkable transformation into a Brynneresque Ramses.
A fire station that underwent a £1m transformation into an arts venue is to have its official opening later.
Ms. Douglas makes a quick transformation into a teenager, and becomes the very model of hyper, post-pubescent grunge.
– but it yields a spectacular transformation into the Forest of Arden.
As she finished, Hale flexed as if to indicate a deepening transformation into Shepard.
