Say I were to swap out an <img> within my main site header to use SVG instead. Normally I would depend on the <img>'s alt tag.

Is the SVG <title> the best replacement method for "alt" with this type of changeover? 

<svg role="img" aria-label="title + description here]">
  <title>[title here]</title>
  <desc>[long description here]</desc>
  ...
</svg>
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