Cyberforming

Eco-structuring is the process of converting a planet into an environment hospitable to mechanical lifeforms, particularly Cybertronians. It can be performed rapidly through devices capable of converting organic matter to technological matter, such as the Key to Vector Sigma. It can also be performed manually in a much more gradual process, such as that performed by the Cybertronian Empire in the construction of the Hub.

It is also known as cyberforming.

Generation 2 (Marvel Comics continuity)

The Cybertronian Empire, believing organic life to be little more than bacteria and viewing mechanical life as the pinnacle, have been eco-structuring worlds for millennia. They believe this to be construction rather than genocide. The indigenous lifeforms are clinically exterminated, and a metal casing for the planet is manually built. This can seemingly be done quite quickly.

Before War Without End!, Grimlock and his Firestormer team had encountered seventeen "little Cybertrons".

Beast Machines

In the Beast Machines cartoon, the Oracle revealed that even Cybertron itself was not originally technological, but had been an organic world cyberformed.

This would be have been done by the Quintessons if one follows the G1 cartoon continuity primarily, or by Primus if one follows the Botcon/OFTCC convention fiction or comics.

Movie (2007)

In the Titan Transformers comic, the All Spark is established as being capable of cyberforming a planet. Transformers Comic issue 9