CONSER practice is to provide a variant Variant title (246 field) for a portion of the title when a user might consider this portion to be the Title proper or when an additional access point will improve overall access. (RDA 2.3.6; see also LC-PCC PS 2.3.6.3).
Parallel Titlestitle. The Parallel title proper is a core PCC element according to LC-PCC PS 2.3.3. Give a variant access point for parallel titles appearing in the title statement or in a note, supplying a separate Variant Title title (246) for each.
245 00 Revista interamericana de bibliografia = $b Review of inter-American bibliography.
...
246 1# $i Issues for 1952- have English title: $a Inter-American review of bibliography
Portions of the Title proper. Provide a Variant title (246 field) for a portion of the Title properthat is typographically prominent and might be construed to be the title proper. Use “0” as the second field indicator consistent with Marc21 field coding instructions for the portion of the title.
245 00 $a Tables showing progress of federal aid and allied highway programs.
246 10 $a Federal aid and allied highway programs
Section of the Title. When the title proper consists of a common title and section title, provide a Variant Title (246field) for the section title when the title is distinctive and will provide useful access.
245 00 $a Journal of physics. $n D, $p Applied physics.
246 1# $a Applied physics
Corrections to the Title proper. If the title as it appears on the resource contains an incorrect word or phrase that has been corrected in the title proper (245 field), give a variant access point for the title as it appears on the resource.
245 00 African seminar series.
246 1# $i Issue for 1986 has title: African semminar series