Changing Product Title

I want to change the font size and weight of the product title on the product page. The course on Lynda.com said to replicate the woocommerce structure under the theme being used (Storefront) for any php files you want to change.

So, I created the following under Storefront:
woocommerce->templates->single-product->title.php

On making a change to the title.php file, it was ignored when I refreshed the site and the original title continued to be used based on what was displayed.

My question is am I right in doing it this way or have a missed a step somewhere along the line?

thanks