The best replacement for twig is smarty.

The best alternatives to twig are rated as following:
★★★★★  smarty
★★★★  branch
★★★  blade
★★  handlebars
★  raintpl
★  mustache
★  volt
★  tinderbox
  swig
  objectify

Your alternative for twig is not listed? Suggest!
Speaking about twig, one probably shouldn't forget about laravel.

Other search terms related to twig and their ratings are:
★★★★★ laravel
★★★★ silex
★ symfony
You have in mind a companion for twig and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of twig in all years. Click on graph for more.
twig
smarty
branch