Sharepoint 2010 - Hide "Title" field in Custom Content Type

Question

Now I'm defining a new Custom List Definition within a Custom Content Type, The problem simply is the Title field associated with the list can't be hidden, I have followed some approaches found in the below links but with no success.

• Can't hide the title column in a custom content type

• How can I remove/hide built-in Title field in list definition

Simply adding the List definition without implementing a content type makes the Title field disappeared, but when defining the content type and its fields, it's always visible.

Elements.xml

  <ContentType ID="0x01003EBF692DD17B4F71966712180C0D23D8" Name="ContactUsAssignments"  
               Description="Contact Us Assignments content type">
    <FieldRefs>
      <FieldRef ID="{4B888F48-A039-46D0-B2E1-C67802097069}"/>
      <FieldRef ID="{6238a52d-2975-4e8a-9a1e-31b9cdc74129}"/>
      <RemoveFieldRef ID="{D3D0DDF1-F791-4FFF-893C-0C100B724F1A}" />
    </FieldRefs>
  </ContentType>

I've also tried Inherits="FALSE" Version="0" but unfortunately nothing changed.

Schema.xml

  <ContentTypes>
    <ContentTypeRef ID="0x01003EBF692DD17B4F71966712180C0D23D8"></ContentTypeRef>
</ContentTypes>
<Fields>
  <Field Type="Text" DisplayName="Title" Required="FALSE"
   ID="{D3D0DDF1-F791-4FFF-893C-0C100B724F1A}" StaticName="Title" Name="Title" Hidden="TRUE" />
</Fields>

I don't know exactly if I've missed something, but the approach is clear enough. Thanks.

Answer 1

All the answers mentioned here were tested, but with no success. After many investigations and attributes-combination I've came up with the below answer as the working one.

a. On Elements.xml file on each list Definition make sure that

Inherits="FALSE"

for the Content Type.

Hidden="TRUE" Required="FALSE" DisplayName="_hidden"

for the "Title" field definition.

<ContentType ID="0x01007F465964D8114436BD7D7CF2C2D8CF01" Name="Categories" Group="Category CT" Description="Category content type" Inherits="FALSE">
    <FieldRefs>
      <FieldRef ID="{BA7EBEF9-338B-45DE-9743-E394873060A7}"/>
      <FieldRef ID="{fa564e0f-0c70-4ab9-b863-0177e6ddd247}" Hidden="TRUE" Required="FALSE" DisplayName="_hidden" />
    </FieldRefs>
  </ContentType>

b. Remove any reference for Title Field on schema.xml