However, "elasticize" is not a commonly used word. It means "to make something elastic."
Instead of using "elasticize," you might consider using other verbs that describe the action of making something more flexible or stretchable, such as:
* Stretch
* Extend
* Expand
* Make flexible
* Make pliable
For example, instead of saying "He elasticized the fabric," you could say "He stretched the fabric" or "He made the fabric more flexible."