Is it Possible to use a Field Value as the Title for an Object Field?

fields: [
        {
            name: 'content',
            type: 'object',
            inputComponent: Tabs,

            // Tabs
            fieldsets: [
                { name: 'details', title: 'Details' },
                { name: 'infos', title: 'Informations' },
                { name: 'content', title: 'Content' },
            ],
            options: {
                // layout: 'object'
            },

            // Fields
            fields: [
                /**
                 * Details
                 */
                {
                    name: 'title',
                    title: 'Project title',
                    type: 'string',
                    fieldset: 'details',
                    validation: Rule => Rule.required(),
                },

  preview: {
    select: {
      title: 'mainTitle',
    }
  }