The candidate set is:

All elements with a title attribute

The test logic is:

Ignore the following from the candidate set:
iframe
frame
textarea
select
a
abbr
acronym
style
link
img with alt attributes. So do not flag img with alt
input with any type attribute value other than "image". So only flag input type="image".

Alchemy Test: Avoid the sole use of the title attribute on elements

Textarea with title (should not be flagged)
Select with title (should not be flagged)
A tag with title (should not be flagged)
Linker
Abbreviation with title (should not be flagged)
AMP
Acronym with title (should not be flagged)
WWW
Style with title (should not be flagged)
Link with title (should not be flagged)
Darude
Image with title and alt (should not be flagged)
Teh Catz
Input type text with title (should not be flagged)
Image with title and no alt (should be flagged)
Input type image with title (should be flagged)
Div with title (should be flagged)
Abra Cadavra
h2 with title (should be flagged)

Paris

Textarea without title (should not be flagged or be in candidate set)
Abbreviation without title (should not be flagged or be in candidate set)
AMP
Div without title (should not be flagged or be in candidate set)
Hepro Divinus
h2 without title (should not be flagged or be in candidate set)

Berlin