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Kidnly remove the "|truncate:30:'...'" from the below file : 

\themes\{Your-theme}\templates\catalog\_partials\miniatures\product.tpl

Replace

 {if $page.page_name == 'index'}
            <h3 class="h3 product-title"><a href="{$product.url}" content="{$product.url}">{$product.name|truncate:30:'...'}</a></h3>
          {else}
            <h2 class="h3 product-title"><a href="{$product.url}" content="{$product.url}">{$product.name|truncate:30:'...'}</a></h2>
          {/if}

with

 {if $page.page_name == 'index'}
            <h3 class="h3 product-title"><a href="{$product.url}" content="{$product.url}">{$product.name}</a></h3>
          {else}
            <h2 class="h3 product-title"><a href="{$product.url}" content="{$product.url}">{$product.name}</a></h2>
          {/if}

Screenshot : https://nimb.ws/ITaAmu

It is the easiest way to achieve the same.