When you have multiple template files in the same component, you can group them together for clarity. An example would be to create a templates folder within your component.

components
_global
dist
templates
Twig Created with Sketch.
html.html.twig
Twig Created with Sketch.
page.html.twig
Twig Created with Sketch.
field.html.twig
sass Created with Sketch.
style.scss