Can I show an alternative representation of a field value when building a title?

Yes you can, with this kind of annotation:

${My field.Alternative}

Where My field is the field you want appearing in the title, and .Alternative is the name of the field within the field value you want to target instead. This is great whenever you, for example, want to swap out written-out states for emojis.

Example

You have an Options field with some pre-determined options. For each option, add a field like Icon and put a different value for each.

When writing out the title expression in the supertag configuration, use the 1. field name in the 2. title expression format, plus add the field (in this case, "Icon") you are targeting inside the field value which will 3. make the value of the new target field appear instead.

You can go deeper with the targeting by adding more periods. So, you could have something like Field.Field2.Field3 for example.

For more information on title expressions, check out this section in the Supertag doc.